Our friends at YoYoExpert.com have created the most comprehensive tutorials ever to help you learn yoyo. Here are a few to get you started, and then visit YoYoExpert.com/Learn for tutorials on over 100 tricks for all skill levels!
Learn YoYo Tricks With YoYoExpert
Basic Types of YoYos
Basic Styles of YoYo Play
Adjusting YoYo String