The pilot reported that prior to departure he noted that both wing tip tanks were full of fuel and that the main tank was at least 2/3 full, giving adequate fuel for the flight. After takeoff, the pilot repositioned the fuel selector to draw fuel from the right tip tank, and later, while en route, the pilot switched the fuel selector to the left tip tank. Approaching the destination airport, the pilot became somewhat distracted while talking with a passenger. He did not follow the prelanding checklist and failed to reposition the fuel selector to the main tank, which contained adequate fuel. When the airplane was about 2.5 miles from the airport, all engine power was lost. The pilot then repositioned the fuel selector to draw fuel from the main tank; however, engine power was not restored as the airplane descended from the traffic pattern. The pilot made a forced landing on the underlying rough terrain. During roll out, the airplane collided with vegetation and a wing broke.