Usually I'm not a big fan of campaign notebooks, as the the creator's design seldom matches the note-taking needs of my campaigns. But I have to admit that this beautifully designed, Creative Commons licensed PDF notebook may change my mind:
http://www.thechronodex.com/
The PDF file is...
I wanted to really break down the spellcasting process for some new players. I started with wizards, as they are probably the most complex casters with the most misunderstood abilities and limitations. The result was this flow chart and lexicon, available as a PDF here...