Other contributors have said "How do you grt mantras?" is the same question as "How do you learn Mantras?" If you believe that these are not asking the same thing and should be answered differently, click here
This is an excellent question. You actually can learn better ways of learning -- click on some of the related questions for more information, too! Ways to improve your learning skills: Pay attention!...
I'm pretty sure it means learning how to pay attention in class or practicing to get better at things, but if it heps any you learn through your higher vertebrates.