A willingness to lose doubled my learning rate. I recently started quitting games faster when I wasn't having fun (or predicted low future fun from playing the game out). I felt bad about this because I might have been cutting off some interesting come backs etc. However, after playing the new way for several months (in many different games) I found I had about doubled the number of games I can play per unit time and therefore upped my learning rate by a lot. This came not only from the fact that many of the quit games were exactly those slogs that take a long time, but also that the willingness to just quit if I stopped enjoying myself made me more likely to experiment rather than play conservatively.