I've got two things that make my life very simple on the bikes I don't have tricked out to be commuters, one is this http://www.topeak.com/products/racks/mtxbeamracke-type a quick release rack, only rated to 20lbs but that's fine for my commutes, and something like this (mines a trek one and very different but can't find any links) http://www.amazon.com/Ibera-Bicycle-.../dp/B002T7PSPE