Make sure you know how you best revise. Yes, teachers might nag you to go to revision classes but if you feel like you work better alone, then going to revision classes should be optional for you. Find out if you can do more work whilst playing music out loud or if you like doing work with headphones on so as to block out the surrounding noise or if you just like to revise in silence. Whatever it is you like, find out early so that you can have optimal and more effective revision sessions. Personally, I like revising on my own with music playing out loud if I’m in the comfort of my home but if I was in a public place like school or university, then I would revise in a quiet place with no music. This is very important because you want every revision session to be as effective as possible and just say you have allocated 2 hours for revision and you don’t know your learning technique, then you might spend 20 minutes just trying to get comfortable which will hinder the effectiveness of your revision session. So, know your learning technique to reduce the chance of critique.