Practice

Never. Only brainlets need to practice.

>>9170214
As much as necessary. It varies from person to person. Do exercises until you want to stab your eyes out from the repetition. And then do four more, since at that point you should be capable of doing any exercise with closed eyes.

>>9170214
I usually just do problems until I feel confident I can use the concept in abstract ways. Full disclosure though, I learned most of my math from reading textbooks on my own, so I can choose what problems to do or not to do, and always have to work with a limited amount (unless I want to find some online).

Normally, I like to experiment with some mathematical concept on my own, and get a sense of how it works. Just come up with random areas where you can use it, and observe what happens when you change different aspects of it, etc.

Maybe I'll follow another textbook concurrently with my current lectures/textbook. Thank you for this idea.