Hey Bill
I've used McCormick's Steakhouse Grinder Seasoning and really like it. It's has all the good steak seasoning stuff in it and it's a no brainer.

Gotta agree with everyone else too. Start with a really hot grill and then move to med-low heat to finish cooking.
Of course, if you can, try to get a good fresh cut of meat. If you are really serious about it I would get some fresh stuff from the butcher.

Here's another one to try. It's from the BBQ University guy that I like.
BBQ U Tuscan-Style Porterhouse Steak