I have been playing guitar for the best part of 20 years. I found myself on a bit of a plateau, sticking to the style I was reasonably comfortable with.
I found this forum a few years ago and I can recommend it to anyone who plays at whatever level
WholeNote - The On-Line Guitar Community - with guitar lessons OLGA guitar tab music chords scales and other goodies...
This site offers tablature for every genre of guitar play. From classical to progressive rock. From Blues to Flamenco. You can hear the sound, reduce the tempo, play the whole song in a loop or just play a couple of bars. I defy anyone not to widen their repetoire or improve their skill.