If there was something that was safe and effective, don't you think we all would have heard about it by now?
Some men tout stretching exercises and shit like wrapping their cocks around a piece of pipe to stretch it out, but there's no conclusive evidence that this works or won't damage the cock to the point where it doesn't work properly long-term.
Pills like ExtenZe might help blood flow, but they don't make the cock longer permanently. Their ingredients could interact with medications or have nasty side effects. The companies that sell them often scam people financially and the 'secret formulas' are always very expensive.
If you can't manage to be confident about what you have, become confident with your sex and relationship skills. If you please your partner with your mind, heart, hands, mouth and even toys, your cock isn't going to matter much, if at all. Men who focus on their cocks and think they're the main source of their partner's pleasure are inevitably bad lovers, in my experience. Those who focus on pleasing me in every other way and don't worry about their size are the best lovers.
Oh, and the average length is around 5 inches. A lot of guys don't know that and worry they're smaller than average no reason whatsoever. But even if they are smaller, who cares?
Think of it this way...
more than likely the woman you are with can: take you all in her mouth, probably be more willing to try anal if that is your thing, and you can get fairly rough without her feeling like you are trying to dialate her cervix. see now don't you feel sorry for the above average guys? *wink*
Bigger won't get yah more women and besides the confidence part, I think having a likable personality and treating her right would be more valuable and should be the source of confidence.
When I go on a date, I don't think about how big my cock is. Lets just say thats not even an issue, but then will I have something to talk about with her? Will she sit close to me or am I going to just make a new regular friend. By time she gets to see my package shes already picked me for other reasons, and even if she has a big surprise, it wouldn't have changed much else.