Seconding RolfAndreassen's comment. Quit learning concepts for a while, instead take a big pile of problems that should be solvable way below your current level of knowledge, and solve them. For example, you could Google for some 8th grade math olympiad problems, and start going through them without skipping any. If the first ten yield too easily, go up a grade; if they're too hard, go down a grade. Don't be afraid to go down as far as you need to be comfortable. After you go through a couple hundred problems, some habits should start to form.