I've recently added a bunch of FREE guitar practice and lesson material on my website.

Free Guitar Lesson Material — Daniel DeLorenzo

Most of the material is geared toward jazz guitar, but there's a lot of useful information for anyone that wants to learn more about music and how it applies to guitar. Everything is in printable .pdf format. Additionally you can find blanks for writing charts or chord diagrams. Be sure to check back as I'll be adding more over time.