To stay mentally and physically quick, you must take care of yourself. Exercise at least 3 times a week, or more if possible. Exercise increases blood flow to your entire body, including your brain. Your body will thank you with speedier reaction times and plenty of endorphins. If you are not used to exercising, work your way up with shorter simpler exercises. Start with a 15 to 30-minute walk, then move on to jogging or swimming. Eat healthy, balanced, and consistent meals. Eating right gives your body the fuel needed to perform at its best. Work some eggs and spinach into your diet; they're super foods for the brain, both containing the amino acid tyrosine, which has been shown to increase reaction speeds. Conversely, drinking alcohol or using illegal substances can slow your reaction speeds down. If you are tired, you'll respond sluggishly no matter how well you eat or exercise. Make sure to get at least 8 hours of good, solid, undisturbed sleep a night. This will allow you to stay alert for longer periods. How much sleep you need will depend on your personal needs. Typically, this will be between 7 and 9 hours. Don't get too much sleep either. If you wake up early, then go and start your day. Sleeping in can make your body and mind sluggish. It is very tempting to down a cup of coffee whenever you need speed and focus on a task. Be careful, though, because this one can backfire! Control your caffeine consumption so it boosts your response times without making you fidgety and scatter-brained. Stick to just 1 cup prior to working on a task requiring quick responses so you don't get jittery and lose focused. This also goes for energy drinks as well. Don't ditch the coffee only to replace it with a canned energy drink. Some medications can slow down your response time and reflexes. Or, you may even experience dizziness or blurred vision. If you need a high reaction speed, make sure to talk to your pharmacist or your doctor about how your medications might impact your abilities. This is an especially important step to follow if you are about to drive a motor vehicle. Even in good conditions, you'll want to have sharp reflexes. Don't get discouraged if you can't change your medications at all. By working on your mental and physical agility, you can still improve your reflexes.
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One-sentence summary -- Exercise. Eat right. Get enough sleep. Limit your consumption of caffeine. Monitor your medications.

Wear a fitted turtleneck or blouse underneath strappy, fitted dresses. For dresses that fit more loosely, try wearing a long sleeved, collared blouse underneath. You can even try wearing long sleeve blouses underneath sleeveless dresses. Oversized sweaters are a great way to keep your upper body warm. Wear them over strappy or open shoulder dresses. They go well with maxi dresses, too. For example, wear an over-sized knit sweater over a tunic or a shirtdress. Do this by wearing tight-fitting sweaters or crewneck shirts over your dresses. You can wear them over short or long dresses, whichever you prefer. Make sure to wear tight-fitting sweaters over tight-fitting dresses to avoid a bulky look. Statement coats are a great way to keep yourself warm while wearing a dress. Choose a thick coat to wear over shirtdresses, tunics, and short or long dresses. For example, choose from faux fur coats and fitted short or long wool coats. Instead of wearing one thick coat, mix and match jackets. Choose two different jackets that complement each other and wear them over your dress. You can even add an additional layer by wearing a vest underneath your jackets. For example, wear a leather or jean vest over a fuzzy jacket, or layer a fuzzy vest over a jean jacket. You an also try layering a printed poncho over a leather or jean jacket.
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One-sentence summary -- Wear shirts underneath your dresses. Try an oversized sweater. Turn your dress into a skirt. Wear a statement coat. Layer jackets.

It's possible that your brother just simply doesn't understand why privacy and personal space are a big deal. Begin by talking to him and explaining why it bothers you that he goes through your things. Ask your brother how he would feel if you were touching his personal belongings, rearranging them, and possibly breaking them. Chances are, if given a moment to think, your brother will recognize that he wouldn't like it if you were doing these things. This will encourage him to reevaluate his behavior. Tell your brother that when he gets older (like you!), he will want his own space. It's possible that he doesn't understand that it's not appropriate to go through someone else's things without asking first. Yes, sharing can be a great thing, but it has its time and place. If the problem continues, consider asking for a family meeting to discuss privacy and personal space. However, don't create a situation where your brother feels attacked. Instead of accusing your brother of invading your space, explain how you feel when your space is invaded. In other words, stress your feelings rather than his actions. If your brother still doesn't want to leave your stuff alone, you could decorate a container or box and give it to him. Tell him that this is a place where he can collect his favorite things. You can put one of your brother's prized possessions in the box to get him started, and help him find a special hiding place for the box. This way, you will be teaching him about privacy and personal belongings in a way he can better understand. If your brother constantly messes with one or two of your belongings, see if there is somewhere else you can put those items. You could keep them in your locker at school, at a friend's house, or in your parents' room. For instance, if your brother sneaks into your room to play with your guitar, ask your music teacher at school if you can store your guitar there. You could also ask your parents if you can keep the guitar in their room when you aren't using it. Your brother will be less likely to sneak into your parents' room. If your brother is constantly snooping in your room, and you've tried everything else, explain the extent of the situation to your parents. Ask them if they would allow you to lock your room when you are not home so that your brother doesn't go through your things or break any of your valuables. Your parents might be hesitant to allow you to lock your room, since you would be locking them out of your room as well as your brother. Be sure to say that you want them to have a key so that they can access your room if need be when you are not home. If you share your room with your brother, you obviously can't lock him out of your room, because it's his room, too! Instead of asking for a lock on your room, you could ask your parents for a lock box where you could store the important things that your brother keeps messing with. Again, emphasize that you would want your parents to have a key as well so that they know you aren't trying to keep secrets from them. If your brother steals your phone, laptop, or ipod, you can password protect these items so that he cannot use them. Also, be sure to secure your online accounts (such as gmail and facebook) by changing the password regularly. Maybe you have a shared, family computer instead of your own laptop. If your brother snoops through your emails or social media accounts, be sure that the passwords aren't saved on the computer and that you have to manually type in your password to access your accounts. If your brother reads your school work on your shared computer, consider saving your work on a flash drive or in a password protected cloud storage platform, such as Google Drive or Dropbox.
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One-sentence summary --
Help your brother understand. Take away the temptation if possible. Ask your parents for a lock. Put a password on electronic devices and online accounts.