1) Start now
I really can't emphasise this one enough. Sitting back and thinking you have all the time in the world may be the case at this point, but unless you actually start, you're not going to get anything done. So make a resolution to do something today, even if it's just for five minutes. In fact, make five minutes your actual goal, because you can definitely, definitely do this. And afterwards you can feel smug that you did some revision!
2) 'Little and often' is better than 'once or twice but really loooooong'
Related to the above point, but the only way to get better at something is to do it every day without fail. But telling yourself "right, as soon as college is over I'm going to revise until I pass out" is pretty much doomed to failure for many reasons. Top of these is that you're going to feel pretty crappy about yourself if you don't live up to your inflated expectations, and the next step is thinking along the lines of "well I screwed that up yesterday. So frankly there's no point in even trying today". So little and often is the key. Start with five minutes, bump it up to ten, and by the time you're a week before your exam, you'll be doing an hour per subject a day and it won't even feel that terrible.
3) If you get bored, do something else (revision related)
This is really important. I have vivid memories of revising for my A-levels and then realising that I had no recollection of the last hour of revision, essentially meaning I had wasted precious time I might have well have spent playing Super Mario 64 (it was a very different time). The issue wasn't that I was too tired or was doing the wrong kind of revision - it was because I was bored. So if you're bored, there's plenty of other things related to revision you could be doing, from switching to a different subject, phoning a classmate to moan, or using a completely different revision method.
4) Use as many different revision techniques as possible - mix it up!
Contrary to what you ma have been told, there is no such thing as a 'bad' revision method. For some people, reading through your notes may be the most effective form of revision, but even if it's not, it's important to mix things up. A change is as good as a break, and all that. Some examples include
- reading your notes,
- making notes from notes,
- pass cards,
- mind maps,
- spider diagrams,
- a study buddy,
- past papers,
- completing timed essays (A2 will know all about 16 minute paragraphs by now!),
- just clicking around and looking at the blog,
- reading someone else's notes,
- teaching someone else the material,
- scrap notes,
- revising key scenes and texts
5) Remember, the 'A' in 'A-level' stands for 'advanced'
One thing to remember is that A-levels are really really hard. They were designed to challenge students beyond compulsory levels of education and as a way for universities and employers to quickly assess a candidate's critical thinking, specialist knowledge and ability to perform under pressure. they are assessed on a completely different level to GCSEs. A C at A-level is much harder to achieve than a C at GCSE. So if you're finding the subject tough, that's good. This is what you signed up to, and it means you're taking it seriously. If you're cruising through the subject, you're not fulfilling your potential.
6) The best exam revision is completing past papers...
...which might seem fairly obvious, as this is what you'll actually be doing to get a grade, but remember to do this in conjunction with other forms of revision. My personal recommendation: pick a question, find key scenes, make scrap notes from class notes, come up with a definitive argument, then close everything and write a timed response. You can then submit this to your teacher for feedback.