There are several great products on the market for this purpose. I personally like to use a product called Lexol cleaner, then the Lexol conditioner. I have also used the Meguiars Lether cleaner/conditioner in one. These products can all be found here at the local auto parts stores ( Autozone, Advance Auto, etc) and sometimes even Wal Mart carries them. I'd say try one of those, and see what you like the smell / results best of, and use that. The main thing is to clean before you condition, and that you do both pretty often. The more often you keep the leather conditioned, the better it will resist dirt and cracking.
You could also try autogeek.net. They have some excellent products on that site as well, which are a bit more pricey, but you may find you like them better.
Good Luck. :thumb: