Pet Raising for your other characters Gardening PVP Farming Darkmoor Farming Halfang to give the gold to your other characters Badge Farming Helping out lower levels with Join a Team
Dungeons to try and improve gear, PvP, Fishing, Pet Hatching, Tournaments, Derby, Gardening ... You can also make another wizard if you haven't filled all 6 slots and play a different school until the next world comes out.