It looks like a blue icon with a white ellipses in a thought bubble located on the dock or desktop. The iMessages account will be listed with other accounts on the left side of the menu. This will disable the app's ability to send and receive messages. You will have to click Sign Out again if prompted to confirm.
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One-sentence summary -- Open Messages. Click Messages in the top left corner of the screen. Click Preferences. Click the Accounts tab. Select your iMessages account if it is not highlighted in blue. Click Sign Out.

The tissue type you choose depends on your current needs. Spend some time considering why you need tissues. If you have a cold, more heavy-duty tissue types may be necessary. You also may want to consider softer tissues or tissues that use aloe vera or lotion. This can prevent chafing from blowing your nose too often. If you're just using tissue for day-to-day allergies and occasional nose blowing, you can probably opt for a cheaper brand that is less soft and does not have any special lotions or creams. There are many different types and brands of facial tissues. Spend some time evaluating tissue types before making a decision. Consumer Reports runs tests reviewing the effectiveness of various types of tissues. Keep an eye out for such reports when making your decision. This can help you choose the most durable tissue available. Keep in mind your use of tissues can affect how effective they are. If you have rough skin, for example, you might want to opt for a 2-ply or 3-ply product to prevent tearing. If you're simply looking for tissues for day-to-day use, you might just want to buy tissue at sales prices. Keep your eyes peeled at the supermarket. You can also look for coupons in your local newspaper. If tissues are being sold in bulk prices, like 10 boxes for $10, it might be a good idea to stock up so they'll last you awhile.
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One-sentence summary -- Evaluate your needs. Review tissue types. Watch out for sales.

Increasingly the biggest problem for those who would rather keep their work and private lives separate is the proliferation of social media. People record all aspects of their lives and sometimes don't fully comprehend how accessible all of this information is to anybody who cares to look for it. The first step to tackling this problem is simply being aware of it and thinking about how your social media activity could reveal parts of your private life you'd rather keep out of the office. If you want to maintain a professional image online and don't want to invite questions about your private life, avoid posting anything openly that could threaten this. This includes text and comments as well as photos. If you want to keep the two elements of your life separate you need to do this outside of the office as well as inside it. Don't tweet or comment about your job or your colleagues in your social media accounts. You might consider setting up multiple social media accounts to keep the two areas of your life separate. Consider connecting with work colleagues on professional sites such as LinkedIn, and reserve things like Facebook for personal friends and family. This will help you keep these arenas separate. It is possible to be active on social media without blocking your colleagues' friends requests, if you just want to use your online profile to keep in touch with friends. Think about how you can adjust your privacy settings so that you limit the amount of material you share with your colleagues. You can control the amount of information about you that goes online and you can, to some extent, control who has access to it. But be aware that once something is on the internet it is not likely to disappear quickly. So much communication in our working lives and our lives outside work is conducted through email, that it can be easy for your work email and personal email to blend into one. You should be conscious of this and take steps to make sure you keep the two separate. Always use your work email for work and your personal email for everything else. Set a time when you will stop looking at your work email in the evening and stick to it. Keeping these email boundaries will help you to avoid carrying your work around with you. Depending on your place of work you will have to develop a strategy for cutting off work communications that fits in with your job. In most cases, you do not have a right to privacy in your work email. Your boss is usually legally able to read anything sent or received in work email accounts. Keep your personal matters in your personal email to avoid any sharing of information you want to keep private.
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One-sentence summary -- Be aware of your social media activity. Adjust your privacy settings. Only use your work email for work.

It's the icon that resembles two silver gears. Tap the icon on your home screen to open the Settings menu. It's next to an icon that resembles a compass. This turns the pop-up blocker on for the Safari web browser and blocks intrusive pop-up ads.
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One-sentence summary --
Open the Settings menu. Scroll down and tap Safari. Turn on the toggle switch next to "Block pop-ups".