Types of Fish:
Salmon (try to get wild salmon vs. farmed whenever possible)
Tuna (Big Eye tuna is the best!)
How to Fry and Grill Fish
How to Steam and Poach Fish
A ton of lighter recipes from CookingLight.com (one of my favorite sites for lower-fat meal ideas)
As for putting fish in tupperware - i don't know about anyone else, but I do it. it isn't as tasty as freshly prepared fish, but it serves its purpose during a busy week. Just be polite and don't use a microwave in an enclosed office area if you know your fishy lunch is going to stink up the place!