Sites you may want to check out:

The Bulletproof Musician – a website about overcoming performance anxiety

Memorising Music – a blog that explores how musicians memorize music

The Memory Map for Music – an introduction to visual mapping for music

Uncommon Sense Pedagogy – tips and insights about healthy movement patterns

Neuroscience for Kids – great website by University of Washington faculty.  Aimed at kids, but good for everyone

Julie Nagel’s blog on performance anxiety – Nagel is a graduate of Juilliard in piano performance as well as a practicing psychoanalyst helping musicians deal with performance anxiety.  She has a unique perspective.