The very best thing you can use is saddle soap, I have found a liquid kind at Wal Mart in the animal feed section (called saddle soap, clear bottle with tan liquid). This stuff dries in seconds so you can wipe it off and it keeps your leather soft. If you look at the Ford brand and look up the MSDS sheets on it you will see it is made out of the same ingredients as saddle soap.
I like the liquid better than the paste for its ease of use.