I've always really liked Effax Lederbalsam; applied lightly, it will make your leather tacky, though you can buff it with a soft towel to get rid of some of that. (Or your breeches will do it for you when you ride, haha.)
I usually clean my saddle, make sure it's completely dry, and then condition it. I use my hands to apply the conditioner, and I think that lets me do a better job of getting just enough on the leather. Plus your body heat will help it soak in more quickly.
It smells really nice and can condition your skin too.