unCUlturers: musings on organizational culture & development (and stuff about credit unions too)
You simply cannot be afraid to fail. Failure, you see, is really one of the keys to success. If you're not failing, you're not trying things. You're not being innovative. You're not taking risks. You're playing it really safe, which is exactly what "they" want. 

So try things. Have original ideas, and further, share them. Talk about them. Rally others around them. Don't be afraid of rejection. Who really cares if someone doesn't like your idea? It's only after working through scores of bad ideas that you're going to reach that one really, really good one. And it's only through failures that you're going to learn, improve, grow, and stretch yourself.

What am I saying? Here it is -- fail. Fail often. And fail fearlessly.