Remember to revise the subjects you feel weakest on. Revision depends on how you learn. If you learn by listening youtube videos like freescience lessons (science), Mr/ Bruff (English) and Hegarty maths (Maths) will help a lot. For maths, practice makes perfect. I use past papers and questions by topics to make sure I can go over what I revised from Maths Genie. Good luck!
What help do you need? Is it revising or do you need specific queries answered about your subjects? The general advice given to you above ^^ is exactly correct and if you follow that you will be fine.