Set yourself a goal at the beginning of this year for what you would dream of achieving and seeing in your envelope next August. Then, just take everyday as it comes, work steadily but sustain focused study throughout the year. When mocks are approaching, take them seriously. If you have a test out of 20 - take it seriously and revise like they were 20 marks of your GCSE. By doing this, you are constantly refreshing older content and by the end of the year, you will find it much easier to revise and it will be a quicker process also.
Make notes whenever you can and ensure that when you are making your notes, work alongside the specification so you are confident you have covered all of the required content, even if you teachers didn't!
Every evening, set yourself a cut off time and don't go over it unless absolutely necessary so you get enough sleep to feel refreshed and ready for the next day. In the holidays, do some revision but also go out with your friends a couple of times so your maintain a balance in all aspects of your life.
Don't worry too much about year 11, all you need to do is work hard and you will be happy once you have finished the year! Good luck!