Most schools do coursework in Y10 so if you are in one of those schools, GET THOSE DONE ASAP TO HIGH QUALITY. Don't even think about letting it fall behind otherwise it will be a burden to you all the way through to May in Y11 when you really dont want coursework hanging. Geography coursework (AQA) requires a field trip, pay attention on that field trip, it's not a funday! Take notes and work in class and you could have it done roughly in 2-3 months!
Take good quality notes in Science and be thankful you're NOT doing the 7s (they were god awful!)
I can't say much for your other options other than the general good notes, word hard, get coursework done etc. I'd say you want to start revising around late Feb-early March for the real thing and a month or two before your mocks (whenever they are!). And revise properly! Don't just "read/skim" notes, make flash cards.... anything that helps: colour, mind-maps, note condensing... list goes on