Anything with a run time of less than 20 minutes, and has 3 or more episodes is on this list. Including DVD/TV specials for longer run-time shows. The list is ordered with stand alone shows first. So, if you're looking to buff your anime numbers...
List in progress
these are strictly comedy/slash silly animes for laughs.
if you're a moody stick-in-de-mud these may help lighten your mood ;)