Revise from the beginning.
And if your doing subjects with factual content such as science, make past papers your best friend!! The questions always change, but the answers dont! I reccomend doing each paper about 5 times, you will be able to remember solid mark scheme answers, as i already said the question will change and it will be worded differently, but can answers really change? There is only one right answer!!
For english literature, gather your perceptive points! And do not let your question frame what points you make! Make whatever point you can think of, and find a way to link it back!
A great perceptive point is name analysis, check out youtube for name analysis of various characters in the books your studying!
For maths, practise formulas and theorems and then put them into exam practice! Do lots of papers.
Remember: Pythagorous theorem and SOHCAHTOA, will always come up! If you have not yet done these methods then you have done something wrong! Go back and check!
In maths you will most likely have time left when you finish the paper, ask for a spare paper and begin working out the questions for a second time! It will help you spot any mistakes and then you can quickly correct them.. It will surprise you how many silly mistakes you can make.
For history, i'd say revise as early as you can! Always go over the content as it is alot! Remember dates and orders, and use key terms e.g breakthrough, progression, regression etc
For languages, use QUIZLET! Sadly i only discovered this website a few days before my exam, but oh my god it is so good! I learnt about 5 sets of vocab and luckily they came up in my exam and i was able to understand it all! Tell your teacher about it and they will have to put up vocab for you to learn! Its very fun and has games too.
Lastly, dont get caught up in relationships and friendship drama but at the same time dont ignore them! Its easy to get extremely annoyed and stressed and you feel like you want to scream at everyone but dont. Maintain your friendships because your all going through the same thing, you just have to do it together, make the most out of your teachers, thats what theyre there for! Constantly ask them for help and resources! I know i annoyed the crap out of mine, especially for printing! But they will support you the entire way and you will miss some of them when you leave for sure! So revise and prepare as much as you can but have fun and stay healthy at the same time! Always remember health is more important than anything! Year 11 will be over before you know it! I cant believe 5 years have finished so fast, i cant even remember anything after January! you will have met some amazing people on the way, keep in touch with them!
Good luck, it'll be over with a blink of an eye!