· Attach a medium-sized pane of glass to a long metal arm and hold it in front of you as a shield. When the glass is aimed at the camera, the infrared beams are filtered and cannot detect the human heat signature. This method was also proved on "Mythbusters."
· Move in areas with busy thermal activity, especially around industrial areas. The heat given off by buildings and cars provides you some extra cover from thermal camera. Hide near rocks, which absorb heat during the day, if you're out in nature. The extreme option for this step is to start a fire, so that your heat signature is no different from the burning objects around you.
· Use a thermal blanket to cover your heat signature. These are quite expensive and it's important to carefully conceal yourself so that you don't create an obvious cold spot on the thermal camera.
· Break up your silhouette using sticks and other objects. This is a basic tactic of camouflage, and it works well with thermal imaging too. Your distinct human form is broken up into odd angles, while still providing enough heat signature to avoid an obvious human-shaped blank.*
*Exerpt from eHow