Tempeh is one of my favorites, it's really versatile, has lots of protein, is apparently easier to digest than other soy products due to the culturing (if that's a problem for anyone in your family), and now Trader Joes carries a really great one that is cheap.
You can pretty much use it anywhere you would use chicken, I would guess (not having ever cooked with chicken, you may not want to take my word for it). Probably the easiest way I make it is to cut it up, marinate it in Bragg's or soy sauce with Spike Seasoning (or whatever mix of herbs/ spices you want) for just a few minutes, then bake or grill it.
You can also make a good "chicken salad" kind of thing, with mayo or vegenaise, a little mustard, dill, celery, whatever else you would put in your favorite chicken salad. You could crumble it or throw it in the cuisinart for this.
It's good sliced thinly with broccoli and "cheese" sauce over rice or noodles (or real cheese, if you prefer).
I have crumbled it and put it in chili, that's pretty tasty.
I also cut it into cubes, toss with herbs, olive oil, Bragg's, and nutritional yeast, then bake it at 375 for 15-20 minutes.