Review regularly. Avoid the all-night session.
GOOD HABITS TO GET INTO
Decide a reasonable amount to study, set a target and stick to it.
Start with something 'easy' or an interesting aspect of the course. (if you can find one)
Choose a place to study and stick with it. Context is important.
Take regular breaks. Take the time to stretch, and focus your eyes on something further away than a book.
Get someone to test you. Switch tasks or activities or subjects if you start to get bored.
Do review and memory tasks at the end of the day.
Try to organise a study group. I did this for my 'A' level Maths . . . . OK, I got an 'E' but it might work better for you...
EXAM PREPARATION
Make sure you know the details about each exam (see AS or A2 revision pages - the one you just linked from)
Prepare summary sheets from your notes. Stress the important areas. Make sure you have all the necessary exemplification.
Break workload into chunks, and prioritise.
It's important to attend classes, particularly towards the end of the course. You may miss vital revision work.
Start by doing an hour a night, and slowly build up as you get nearer the exams, and once study leave starts. It's very easy to while away a day doing nothing.
Don't just read the text. Do something like note taking, or bullet point as you go. Try taping your voice going through the main points and listen to it. Put key words and examples on index cards or flash cards.
Try to use memory methods. Visualising and acronyms perhaps. Try mental mapping or spider diagrams / brainstorms.
Avoid doing too much (not a problem many of you will encounter...) Don't get overtired. Have breaks built into your revision timetable, and get lots of sleep and eat properly.
Make up your own revision tests.