Here's a good quick tutorial at instructables.com on drawing schematics with CadSoft Eagle.
I found this independently-written tutorial to be more accessible (and frank) than any of the documentation that currently accompanies the software:
"One of the major challenges of using Eagle is finding the components you want in the "official" libraries.
These libraries are extensive [and] not particularly well named [...] Many experienced EAGLE users don't use the standard libraries at all, copying common components and packages into private libraries or creating them from scratch."
It's from august 2006; apologies if it's not news to anyone else but me.