You can raise most other skills without trouble, except perhaps, for Mercantile. Go to the tents in Kvatch. Equip any weapon and get on horseback. Once this is done, talk to the Orc woman with corn rows and sell the weapon to her. Your weapon will not be sold but you will get 200 gold every time you attempt this. It raises the mercantile skill while you make money. Win-win.

Submitted by rikyyo