In one sentence, describe what the following article is about:

Keep important dates in a calendar or planner that you can access at any time. Make sure you keep your planner organized, and check ahead during the week to see upcoming dates and activities. You can also use a plain notebook as a planner by converting it into a bullet journal. Use the calendar function on your phone to remind you about an event or appointment. Set the reminder for a few hours or days before the date so you don't forget. Then, all you have to do is remember to carry your phone with you! Sometimes things like email programs will have a calendar that you can mark important dates in, like birthdays. Some will send you an email notice within 10 days of the birthday so you can remember to get a present or make reservations. You can even make a little "notice board" for sticky notes to hang in your kitchen, office, or bedroom, and you can make a habit of looking at it every day. If you know you're likely to forget something important, like watering your plants or grabbing your keys before you leave the house, ask whoever is with you to remind you. Saying the task out loud will help you remember, and they might be more likely to remember. For example, if you have a friend's birthday coming up, you might ask a different friend to text you a reminder when they buy their gift so you can remember to buy yours. When you get a reminder or remember to do something, try to accomplish the task immediately when you think about it. If you can't do it right away, set another reminder for a time when you know you'll be free to do it. For instance, if you set a reminder to tell you to put a book in your backpack, move the book to your backpack as soon as you see the reminder. After you complete a task, you might have trouble remembering if you did it or not. Use your phone to snap a quick picture, and when you start to question yourself later, check your photos to see if you did it already. If it isn't in your photos, you'll know that you didn't do it. This is especially helpful for daily tasks, like closing the garage door or locking the front door. You can make a habit to delete these photos at the end of the day so your photo roll isn't cluttered. When the task or information is so vital that something bad could happen if you forget, organize a back-up plan in case you do. Plan for the worst-case scenario, and use the buddy system to hold you accountable. For extremely vital tasks, set many reminders and use the buddy system to remind you to do it. For example, if you're in charge of buying concert tickets for a group of 4 people, but you forget to wake up early enough and they sell out, you should have a back-up plan in place. In this case, your back-up plan could be buying the tickets secondhand on a re-selling website.
Write down information in a notebook or planner that you carry with you. Set a reminder on your phone for an important date. Ask your friends or family to remind you of the matter. Address the matter or set another reminder as soon as you remember it. Take a picture so you remember what you did. Make a back-up plan in case you do forget.