I’d say plan your revision first. You have a month. Decide what exactly and how many times you want to revise. Also, you probably be having a fair idea how much you can do it in a day, so estimate how much you can in 30 days. Accordingly, cut or add revision materials. Check if you have completed what you planned at the end of day, and plan for the next day. This way you will not end up regretting left out portion after a month. Also, you may check your progress on a weekly basis.
It would be really helpful if you can tell us what is it that you want to revise. Way to revise may differ for different materials. Suppose you want to revise maths. I found it useful to practise everyday. See if you can recall, say maths formulae, while solving examples. I usually solve maths problems after meals when I am likely to feel sleepy. Study something that you want to remember early in the morning when you are fresh.
At the same time, maintain good health. Exercise daily to keep fit. Take sufficient sleep. One of my friends forgot many things he studied a night before because he didn’t sleep that night.Plan good and you will succeed! Good luck happens when preparedness meets opportunity. Best of Luck!