Aside from genetic ability (or lack thereof) the No. 1 thing holding cyclists back is wind resistance. There are lots of ways to better slice through the air. In the last two weeks, Specialized, Scott and Trek all launched new high-zoot aero road bikes. But another, far easier solution than buying a new bike, is learning how to draft, which can save you up to 30 percent of your energy. Here's a step-by-step primer from our friends at the Global Cycling Network.