Alternate different problem $-$solving techniques during your practice. Never practice too long at any one session using only one problem$-$solving technique after a while, you are just mimicking what you did on the previous problem. Mix it up and work on different types of problems. This teaches you both how and when to use a technique $.($Books generally are not set up this way so you'll need to do this on your own.$)$ After every assignment and test, go over your errors, make sure you understand why you made them, and then rework your solutions. To study most effectively, handwrite $($don$\text{'}$t type$)$ a problem on one side of a flash card and the solution on the other. $($Handwriting builds stronger neural structures in memory than typing$)$ You might also photograph the card if you want to load it into a study app on your smartphone Quiz yourself randomly on different types of problems. Another way to do this is to randomly flip through your book, pick out a problem $,$ and see whether you can solve it cold. Random quizzes are bad for my health. Do Don't don't like to mix it up$.$