For Illustrator, I suggest SAM'S TEACH YOURSELF ILLUSTRATOR IN 10 HOURS. Teaches all the basic functions. The rest is up to you. For Photoshop there's no better book than REAL WORLD PHOTOSHOP. It's kind of heavy reading and technical, but you won't find a better reference anywhere. As well, even though I've been using Photoshop for years, and am reasonably accomplished with it, I still refer to the help files and manual while working. I also find that once you understand the work flow of the programs, you find your own way of doing things, which aren't always the ways the manual recommends.

Talent is God's gift to you. Using it is your gift to God.