Internet is full of guitar related sites,tips&tricks,tabs and that is good of course.But what i found some day is what i wish had years ago.E-book that completely changed way i think about guitar and it did that in low-level of my mind.Amazing book for everyone who can't make significant progress in playing even after practicing 5 hours a day.Book is called:"The Principles of Correct Practice for Guitar".This is something that must be read:

http://www.guitarprinciples.com/