I have not even had a chance to ride my new bike yet because it is winter here in Michigan, but I know I need new grips and pedals. Last year I suffered pretty bad with Tennis Elbow, so this year I decided I would try and get ahead of it with some ergonomic grips. I bought a pair of Ergon GP1-L from JensonUSA. So far like the feel of them but only time with tell.
My second upgrade was pedals. Last year was my first year with clipless pedals and the overall experience was good, aside from a few falls when I could not unclip in time. I ran a set of Shimano M520 SPD all season long, but I wanted to try some CrankBrothers because of the increased float. My knees did not always like my feet being locked in and unable to move much. I found a great deal on a set of CrankBrothers Candy 1 at JensonUSA. I also picked up a set of shoe shields to protect the bottom of my shoes.