Welcome to the world of tempeh eaters, SpiderGirl. There are a million things you can do with it--put it in pasta sauce, steam it and make sandwiches, marinate it and then brown it in a frying pan, make stuffed baked potatoes, put it in stir fry... I would recommend finding a good cookbook (I can recommend a couple but I'm new here and I'm not sure if that is okay) and using that too.
Basically, most things that you (used to) do with chicken can be done with tempeh, in my experience.
And, just to reinforce something that has been alluded to already on this thread, making your own seitan is MUCH more economical than buying the stuff in the store and the result is just as good.