>>12204275How quickly are you forgetting? Knowledge is use it or lose it unless what you commit to memory is so minute and general you can derive the rest from that bit. Most of everything you study will be forgotten in two years if you don't continue to use it.
If you're forgetting immediately, try a decent tutor, even for a while. They're professionals at addressing this sort of thing and will save you a lot of trouble figuring it out.
