The best way to season a steak is marinating it.
You can make your own marinade pretty easily.
You need a acidic, a sugar, then spices. The acidic can be alcohol, vinegar or a citric like orange juice. My preferred sugar is brown. for spices you can add almost anything from soya sauce, Heinz 57, Worcestershire sauce and of course traditional spices like garlic and peppers.
Once you have your marinade to your tastes put it in a Ziploc with the steaks get as much of the air out as possible and let sit in the fridge for a day or two.
A good basic marinade for steak is Beer or wine, brown sugar, garlic, pepper and I like adding in a hot pepper sauce. not too much it's just to give the steak a little extra kick