I am in the same position as you right now. I did quite well in my mocks and I am assuming that like you me, you are quite intelligent. The revision you do is just so you can improve your passes. My problem is that I'm not stressed enough! My brain isn't clicking into gear to tell me that I actually need to work so I can do well. However, this is all to be able to have a brilliant life. With good grades we can get good jobs (whether you know what you want to be or not) that not only pay well, but are enjoyable. I have made a poster that I keep on the wall of where ever I am working- it has my ambitions on it to help motivate me to work. It doesn't always work (I have a geography exam tomorrow and haven't learnt half the course and have been lying on my couch watching netflix all day) but when it does I work as if my life depends on it (as it sort of does)Hope this all makes sense and I hope that you and I will get out motivation back soon!