I taught a course on this in Spring 2004 and my notes are still online at:
(albeit handwritten and scanned). The book I was using was
Palm OS Programming Bible, Second Edition. John Wiley & Son. by Lonnon R. Forster.
which you could probably pick up cheap from amazon or Ebay.
To quickly scan stuff I just use the PageScanner app for my iPhone. It takes a picture every ten seconds or so and when done combines them into a single PDF.
Since its in your phone, it is super portable and convenient.