Here's my revision tips:
Start revising early
— i.e. months, not days before the exam. Make a timetable (see samples) to plan your revision and stick to it.
Don't spend ages making your notes look pretty

Take short breaks
— every hour, not every 10 minutes.
Use revision guides

Sleep on your exam notes

In study leave, start revising early
i.e. 9am — that way you'll get your day's work done much quicker and will have time to relax in the evening.
Stick revision notes all around your house

Get yourself drinks and snacks
so you don't make excuses to stop every 10 minutes...
Try reading difficult bits in funny accents
— Australian is particularly good... It worked for my friend Alice (the weirdo).
Sit at a proper desk

Don't put it off
"Procrastination" is the long word for it. And it means rearranging stuff on your desk, getting a sudden urge after 16 years to tidy your room, playing the guitar, thinking about the weekend, writing love poems about that girl/boy you fancy, painting your toenails, etc, etc, etc,... Sit down at your desk and GET ON WITH IT.
Don't just read your notes

Take in a beer mat
To beat the wobbly exam desk — this will do your nerves and general mental state no end of good...
Don't turn yourself into a revision zombie

Do lots of practice exam papers

Read the exam timetable properly
— double-check so you don't miss an exam and have plenty of time to prepare for it.
If really stuck in the exam... play the earthquake game
— throw all your pens in the air and they'll form the name of a city about to be hit by an earthquake.
Find the right environment to revise

Don't hang around with the nervous paranoid
people on the morning of the exam. — they'll just stress you out, which doesn't help at all.
Look at the new CGP tips books

Dress as a medieval knight and demand ale
