Wow, these are some great suggestions. You can generalize a lot of this and apply it to learning any skill.

I had been on a plateau for 10 years. I love music and the guitar too much to have completely given up though. Coming here was what I chose to do differently and it has allowed me forward progress again. I'll definitely be back referring to this when I hit my next plateau. Some things here I've thought of and tried on my own - but others I had never thought of.