Using Solarsoft
SolarSoft is a software package that can be used to acces and analyze FITS files from AIA and HMI.
A comprehensive guide to using SolarSoft is available
here.
Julie Davis, a SUVI summer intern in 2011, wrote a
"Beginner's Guide to Using SolarSoft" which may be helpful
if you are just starting out.
A list of FITS header keywords and various other resources can be found in the
SDO Documentation index.