Once you become a level 20 crafter, you can pick up a secondary tradeskill, either Tinkering or Transmuting -
I strongly recommend tinkering as a wizard - there's so many goodies that I just can't live without anymore
eg:
*Overclocked manastones (20% power instantly every 10 mins)
*Behavioral Modificinator Stereopticon (~5k instant cast detaunt, 1.5 min recast)
*Mendor Bot
*-Two- FD items on seperate recast timers
*Call of the tinkerer (teleport to target groupmate in zone, 1hr recast, unlim charges)
There's a bunch of other goodies, but you get my drift ;)