Eventually, most of us arrive at the realization: It’s now or never. The “tick tock” of life’s clock advancing grows louder until you realize that this is the moment to try things you’ve always wanted to do. And the good news about retirement is that you finally have some time to do these things — minus a lot of the self-consciousness that may have held you back when you were younger. We’re not talking about living on a yacht in Monaco here — stuff that is available just to the very wealthy. There are loads of fun, engaging activities and adventures that are affordable for retirees. Here are some to get the juices flowing.