For bio especially, see if you can get hold of some flashcards, they've really helped me as a lot of it is just memory. I'm also doing chem (edexcel) and bio (OCR A) and I'm focussing on past paper Qs at the moment, going topic by topic to identify my weaker areas, which I will then look over the content for - your plan sounds like a lot of reading but not so much doing (aside from the blurting)