Penmanship practice can go a long way towards understanding traditional typography. Yet when it comes to digital typography the subject gets more confined and particular. Granted there are plenty of tips & tricks for improving typography which you can follow and learn. But ultimately the greatest way to learn anything is by diving head-first into the deep end – just make sure the pool’s filled with water first.
Aside from tutorials and general advice there are plenty of typography tools and resources available to designers. The following examples are likely to be hit-and-miss. Very few people will find everything in this list valuable because it encompasses such a wide array of functionality. But every web and mobile designer will find at least one link useful in this collection of free online typographic resources.
Some other typography-related posts: