>>13882336Generally for math, you should try to understand not only what the definitions and theorems mean, both intuitively and exactly, but also why the definitions are made to begin with.
For books Smillov is the best imo, but assuming you're beyond that stage you should try to derive everything you've learnt from scratch. Take a noterbook, write down what you know, prove theorems you don't fully understand, try to make the definitions intuitive, etc.
