I can straighten the handlebars on my Broad Ripple SUV. I can lube the chain. I can track down and patch the leak in the front tube, or replace it as necessary. I can adjust the brakes.
But when you add all those chores together, plus trying to figure out whether that front rim is bent or not, just taking it to the new bike shop around the corner and saying "Dudes, give this thing a tune-up," gets mighty attractive. Especially because I want it in good shape for pedaling to the Arts Festival this weekend and there's no way I could even begin procrastinating between now and then. (Plus, you know, I can rationalize it as supporting a local business.)