You need to show your excitement and give lots of praise for the simple things he does, and as his confidence builds for the more complicated things he does.
Start small. Tell him how proud you are of him (and maybe give him a little reward/treat telling him why he's getting it) when he does things you expect him to do, but without having to tell him. Have him help you around the house, and then tell him things like "I couldn't have done it without you, thank you!" Tell him how handsome, sweet and wonderful he is!
Your son is young, but in the next 2-3 years, start looking into age and skill appropriate clubs and "pee wee" sports leagues that focus on confidence building through "errorless success" (everybody wins--which I only agree with when children are young,as they get older they need to learn that sometimes they'll lose) and team work.
Your local recreation department and YMCA are good places to start!
at 7:17 AM on Nov. 26, 2009