1. I'd have brought a cheap MTB from home instead of buying an overpriced Jamis Coda from the LBS. This was what I'd originally wanted to do, but my parents wouldn't go along with it.
2. If I'd wanted a road bike (which I did), I would have gotten my Forge first and called it a day. It cost less than the Coda, is more fun to ride, and would have been more than enough if I'd gotten it first.
3. I'd have bought a TSG Evolution helmet instead of the Giro Transfer. Since I got the TSG, I haven't worn the Giro, and will probably not wear it again unless I land on the TSG and need something while its replacement is in the mail.
These are just a handful of the things I'd have done differently if I'd had my current knowledge a year ago. How about you?