Marinate a salmon fillet overnight in teriyaki sauce in the fridge. You can foreman grill it, bake it or broil it. Add pepper, or other seasonings if you'd like...
Marinate your salmon, tilapia, or cod in italian dressing (a nice quality one with tons of herbs)-sprinkle italian seasonings on the top to coat and bake in the oven... very good!
Or with orange roughy, salmon (yeah my favorite) you can sprinkle lemon juice over them, place a few pats of butter and pepper on top place in a pan oiled with olive oil, bake... and Voila!!!
It depends on the type of fish you like, I don't like harsh fish tastes-so I always try to marinade or something, and it he always thinks I'm the greatest cook. fish is very easy to cook, and I need to incorporate it more into my own diet/