30 Days, 30 Ways to Build Better Self Confidence. :zenhabits. - StumbleUpon. Eating 10 hot dogs in 6 minutes and belching the national anthem may impress your friends, but neither of those feats will do much for your body—at least not much good. Instead, why not train yourself to do something that may actually pay off? We're not talking bench presses and interval training (though those do help). - StumbleUpon.