Don't just write out notes again for dot point subjects like business. Use flash cards instead. Anything that you can convert to bite sized pieces of info for any of your subjects would be good for you to turn into flashcards. You can use them for definitions, quotes, formulas, statistics, memorising your syllabus etc. Do at least on session per day for a maximum of 20 mins per session.
These are quicker to make and also improve your memory faster than just writing our notes is.
If you are visual learner, include pictures, diagrams or colour coding to help you memorise. If you are an auditory learner read them out loud and repeat your answers out loud as well because hearing it will help your recall these responses in your exam. If you are a kinesthetic learner, the act of making these cards will help as well as just practicing them. You could also record your notes and put them on your ipod so you can listen to them when you are at the gym or doing some other kind of exercise.
For maths, you really just need to practice. If you want some more advice specific to your learning style and your situation feel free to PM me