Revising is key during the end and with poor management they can really hurt your scores. I personally set a schedule to devote time to each section so that I don't use up my time in one thing only to find I haven't touched another side completely. You might think its trivial as to HOW you revise but good revision strategies and scheduling really help in geting the job done. The right environment is a huge priority and so a little organizing goes a long way.
Discuss your revision strategies here and help each other out.