I think both math and (analytic) philosophy can help. When I say math, there's two different things I have in mind. One is just solving problems. Get any old te

I think both math and (analytic) philosophy can help. When I say math, there's two different things I have in mind. One is just solving problems. Get any old text book at your level and start doing homework problems. Same works for physics. The other thing I have in mind is theorem proving. Look at Paul Halmos' book on Naive Set Theory for example or pick something more at your level. As for philosophy, trying to pin down subtle distinctions and following the extremely abstract arguments could help. You could start there with text books, or reading in the history of philosophy like Aristotle, Plato, Descartes or maybe by looking up concepts and problems you're already familiar with in SEP. Good luck and have fun. [1] hhtp://plato.stanford.edu/