:P I don't even have a predicted grade for my A2 Chem- my teachers think I'm a waste of time...
I need all A's for my summer exams (3 Chem, 2 Bio, 2 Maths, with a bit of Art chucked in on top) - I've been working every day for the last 2 weeks, 10(ish) till 5, normally less, (I get distracted easily :P) I've raised my CHEM2 grade from a C to an A, CHEM5 from a D to a B, and CHEM4 from what I'm guessing was a U, to a B. All this, whilst maintaining my A's in Biology, by revising that a lil, doing a few past papers, etc. and my Maths revision guides are coming tomorrow, so I'll probs quit Chem and do a few days on those.
In terms of revision advice?
Try and fit in AT LEAST 3-5 hours on days you aren't in college. That's not including breaks :P
I normally do a past paper right at the start of my revision, just to see where I am and what needs doing. MARK IT REALLY MEANLY!! :P
My Chemistry teacher told me to find every question I could, and do them all twice, so I'm kind of doing that - working through revision guides for all my subjects, along with textbooks, and collections of past questions for each topic, doing ALL the questions, no matter how many times I've seen exactly the same question before, yes, even if they're essay questions!! Then, if its not quite there, I'll go back, re-read the topic, maybe research a bit more on the bit I don't know, and then try the question again...
Always mark papers and questions after you do them, and make sure you understand why they are wrong...
It takes forever, but if you think about it, it only a month or two out of your whole life, and it can radically improve your future... If it was cleaning sewers, but you knew you'd get say, your dream life at the end of it, would you do it?