The Illuminati's technique is quite good, not much different from mine. I always left the questions on topics that I wasn't interested in until the end too, such as ecology and plants. I didn't revise much on those topics so tried to pick up as many marks as possible in the other areas.
I never got into the whole bullet pointing, most of my answers, especially for the longer questions were quite long, but that was just my writing style, it does work for some people however, as long as you are still clear with your answers and include all the relevant key-words that are gonna earn you the marks.
Another thing I would do, especially on questions over 1 mark would be to count in my head each valid mark worthy point I had written, then try and add another one or two valid points just to cover my ass, as usually the mark schemes have more marks on them than you can actually get in the questions.
Before moving on from a question I would just quickly read the question again, making sure I had answered it properly.
I never really had much time at the end to check over my answers, because I did spent quite a lot of time writing detailed answers, especially for the essay type questions, and then for those more challenging questions quite a bit of time thinking before answering.
That's just what worked for me. Using that approach I ended up getting 100% UMS in all 4 modules. Biology A level is about 70% exam technique. There were people in school who spent a lot more time revising and probably had more knowledge than me, and who had read around the subject material, but missed out on A*s and As because of poor exam technique.