Goddammit someone help me pass BusinessWatch
Apparently, chewing a different flavour of gum to what you're used to will help you retain information easier. Something about it being more profound in your memory...
Oh, and as for nothing going in I had the same problem as you and found it was my revision technique that was problem, I found that Revision cards alone no longer worked for me, so I now re-write thing over and over again until I remember them, and be COLOURFUL and CREATIVE with your revision stick colourful posters around your room on your walls, record your voice saying something you need to remember and listen to it on your way somewhere, just make sure what you are doing is right for you.
Good luck! I wish you all the best.