I'm in my early 40's, and get more girls/women in their 20's now than when I was in my 20's
It doesn't hurt that I look 10 years younger than I actually am.
Doing things like following the advice on this board, and the advice of guys like David DeAngelo, Mystery, Tyler Durden etc...helps, as does working out and looking your best, but Confidence and having the right Attidude is the key.