Hello, I have a PhD in composition and teach music theory and music history for a living. While I've played guitar since I was 10, I never majored in it and so am still basically an amateur, to my great present-day frustration! I have played some good repertoire in public and have taught beginning/intermediate students. I have a gig coming up in late August that I'm quite worried about. (It's actually on electric with electronic effects but I still play in the classical style even on the electric.) In the last couple of years, I was made to realize that I had been practising with poor technique for years and years, developing many bad habits that were causing me plenty of pain. (My teachers knew I was a composer who was interested in 20th century music so they often gave me very difficult repertoire to kind of hack through, rather than progressing gradually through simpler material.) I've been trying to remedy this, consulting Pumping Nylon and Shearer's Learning the Classic Guitar, working slowly through (Canadian) Royal Conservatory books. Some of the things I'm most concerned about are: improving my precision when it comes to timing and accuracy, especially as I get fatigued; and improving my concentration.
I suffer from anxiety and rumination and also from significant general muscle tension. I try to deal with these things with e.g. progressive muscle relaxation and stretches.
Despite my musical education and experience and (academic) teaching success, I still sometimes struggle with aural skills (not something I teach of course), even sometimes with something as basic as this: http://rhythm-bot.skyleapmusic.com/intr ... -beat.html . I'm not entirely sure what my problem is.

