From FlyerGuide Wiki

[edit] Airports

AA.com has a list of airports with ticket counter hours as well as curbside check-in and self check-in possibilities.

FlyerTalk has an airport lookup page that you can also get to by hovering over the Help menu:

Below are links to individual pages with additional tips as compiled by fellow FTers:

There is also a Wiki 'Cheat Sheet' that lists lounges with food/shower availability, domestic check-in cutoff times, and whether a premium security line are available. The Cheat Sheet is designed to be downloaded to your PDA.