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

Things like mnemonic devices can really trigger information that doesn't otherwise want to stick. Odds are you probably know Roy G. Biv for the order of the colors of the rainbow or "My very exhausted mother just slept until noon." for the order of the planets. Why is that? They're effective mnemonic devices that stick in your mind! Associations work, too. If you're trying to remember that India used to be a British colony, picture the queen jogging laps around the Taj Mahal. When the test comes, you may not remember what you actually should remember, but you'll remember enough to jog your memory!    {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/5\/52\/Join-Mensa-Step-13.jpg\/v4-460px-Join-Mensa-Step-13.jpg","bigUrl":"\/images\/thumb\/5\/52\/Join-Mensa-Step-13.jpg\/aid16184-v4-728px-Join-Mensa-Step-13.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"<div class=\"mw-parser-output\"><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/\">Creative Commons<\/a><br>\n<\/p><p><br \/>\n<\/p><\/div>"} You need a good, calm place to study. Make sure you have a sweater in case it gets cold, a good, comfy chair, some dark chocolate (brain power!), a bottle of water, and whatever else you may need. That way, you'll have few interruptions. Research also shows that you should study in more than one place. It sounds a little funny, but your brain makes associations with your environment. So, the more associations it has, the more likely you are to retain the information. Locate all the comfy chairs and study in them all! Although it's inevitable sometimes, cramming isn't the way to go. In fact, taking breaks is good for your brain and will help you retain more. Try to study in 20-50 minute intervals, taking five or ten minutes in between. If you're on top of things, it's best to study over a full week. Several sessions will cement the knowledge in your head and by the end you'll be able to notice how much better you know the content, allowing you to relax and be confident. Easier said than done? Remember - you have all of the answers in your head already! The only challenge is getting them out! Your first instinct is nearly always correct. Don't go back and change answers. If you are really not sure, skip it and come back later.  Always read the questions given on a test. Skimming over them might tell you the opposite of what you need to do. If you're uncertain about the wording of a test question, go and ask the teacher what it means. As long as you don't flat out ask for the answer to a question, just what they meant by the question; they will usually answer. You need sleep in order to stay focused, and without it, you will have a hard time staying on task and may forget what you just learned. That's part of the reason why cramming is so evil! Sleep is wonderful. Sleep deprivation can lead to accidents, dumbs you down, and can actually cause health problems. If you have to choose between one last cramming session and sleep, choose sleep.

Summary:
Use memory tricks. Study in the places that you feel comfortable in. Stop cramming. Relax. Get a good night's rest.