Don't wait. Take the plunge.
\ˈek-sər-ˌsīz\ n. 1: the act of bringing into play or realizing in action 2: bodily exertion for the sake of developing and maintaining physical fitness 3: something performed or practiced in order to develop, improve, or display a specific capability or skill 4: a performance or activity having a strongly marked secondary or ulterior aspect 5: a maneuver, operation, or drill carried out for training and discipline