Prepare for your GCSE's straight after mocks, make sure all you year 10 notes are copied up it will save you time. Do past papers after mocks and stuff.
Also don't get into any beef or unecessary drama you don't need it as you've got GCSES to focus on. Year 11 was like the dark ages for me because I was lazy and stuff, but as long as you work hard then life should be a little bit better. I'm afraid when it comes to A-level it only gets harder, well for some people it doesn't it just depends but generally in imo Alevels aren't any better.