In order to get the most out of your revision, I advise creating a schedule, so you have a visual timetable of your day, & therefore know the times where you're able to sit down & study. This allows you to eliminate periods of time where you're wasting away what could be precious & beneficial time for studying. Make sure when creating a schedule or timetable to factor in any extra-curricular things you have on, & hobbie
If I am in an older classroom I will teach them how to create a weekly planner and plan time to study for test, quizzes, etc. I will do this because I know that distributed practice is much more efficient for memory than massed practice is.