I used to do about 90% on my own, but now it's more like 30%. I do simple stuff -- tires, tubes, cassettes, chains, brakes. I get the LBS to do the more complicated stuff, and stuff I know how to do but I either don't have time or I don't do it much, so I'm just not as good at it, like wheel tensioning, hub and headset servicing, and cable changes (just went to Nokon, and I wasn't about to try that myself). I also find that since I got a really nice bike, I'm much more exacting on things like a slight scratch on the surface of my bottom bracket. When it's generic $20 stuff, who cares...but when it's a focal point because of the color and it's a Chris King or Campy, that's a different story.