Whats the best way to build self-confidence?

Well if you don't think you are unattractive then thats already a plus toward confidence. It's just all about holding your head up when you walk and not staring at the ground. Walk with your chest out and back straight and act like you own the place, by doing this you can atleast "fake" being confident. And by faking it for so long, you actually will get more confident from that. Have you noticed how some ugly guys get plenty of girls? It's because they don't care about what they look like, and they act smooth and confident..why does this work? Because women aren't as shallow as you expect them to be. Women also look for a sense of humor and a good personality in a guy..so if you aren't the best looking guy around, trust me..be sweet to a girl, and make her laugh a bit..and she's yours for the taking. Hope that helps.