These are the most common crochet abbreviations used in my patterns.
anniescatalog.com has great helps on reading patterns and other abbreviations.
crochetcabana.com has fabulous tutorials with pictures on crochet for beginners.
newstitchadayvideos on youtube has helpful videos on all kinds of stitches. This is a direct link to their directory on youtube.
There are lots of other videos on youtube.