1. Don't overdo it;
The best way is to plan your time efficiently and go for a mix between quality and quantity.
2. Everyone revises different
You need to find the way that revision best suits you; whether it be mind maps, or spider diagrams. Don't worry if you are different to the way that your mates study, different things work for different people.
3. Take breaks
It's proven that studying in short 45 minute periods is much more beneficial than hours of solid revision, so make sure you plan your rest time too!
4.Make a timetable
Doing so will allow you to maximise the time in your day and will actually give you more free time. If you continue to muck about with choosing what to study, you are wasting time that collectively adds up to a lot of unused, wasted time.
5. Food, Water, Exercise
Three components that are absolutely crucial to exam success. Without these the body cannot function as well as it could have done, and puts you to a disadvantage. Keep hydrated, full of energy and ready to take on the world!
6. Sleep
Having enough sleep will help you concentrate better and keep your focus while studying.
7. Balanced Life
The more you study the better you'll be. However remember to go out and treat yourself for the hard work you've been doing.
8. Start studying early
The earlier you start, the more time you have to learn all your content meaning, the earlier you start, the better you'll do!
Good Luck!