Prime for water conditioner
Flourish comprehensive and Excel for Plants
Anything by Marineland is excellent, from tanks to heaters to aquarium glue..
API freshwater master test kit
API Aquarium salt
San Francisco Bay frozen foods
TopFin pellets. There's also a pellet by "Aqua Culture" available from wal-mart that is really good (and really cheap).
Indian Almond Leaf.. the best stuff ever!