That's a good question, study are so important, no only in poker, but in our entire life, we can't be better without study, I currently try to play and understand what the players are think, and I come here to read some posts, I like the interaction on posts about some hand, these are great to learn a little, but at all I don't study, I tried the 30 day course from here, but I can't understand so well the english in audio, I prefer to read.
I like to see hand review on youtube, I think this are more easy to understand some spots, I have thinking about get a coach, maybe in the future, there are many good players here in the forum, play against them are good to learn.