I tinted the front with 75%, that helped a little, mostly when driving. The dealership had already put either 25 or 35 everywhere else. The other thing I do, park in the shade often, face the back of the car into the sun when possible, and always pop up the rear shade. I refuse to use any products inside the car, I hate that greasy feeling.
I use Wolfgang Leather Care Conditioner for mine (still have some armorall for cleaning but will get the Wolfgang Leather Cleaner soon). The Wolfgang LCC smells like a nice leather on its own and seems to work well with my beige Nappa leather. The seats do not have a greasy feeling (which I also hate) or anything on it when they are done. I still use armorall on the dash and certain door panels.