If you are mechanically inclined, buy the parts/tools you need and do the work yourself. The only thing I've had done at a shop has been truing wheels. I did not have the know how or the proper tools (truing stand/spoke wrenches) to do it myself. (also didn't want to mess them up, haha)
You feel confident you can fix just about anything you may encounter if you have repair skills under your belt.
My goal for 2013 is to get a nice truing stand. I have tools for just about everything else so far.