It bums me out whenever someone's trying to say something but cuts themselves off or says "nevermind" because they assume that they're wasting time. Think it through, or let it come back to you. 3 years ago, I started saying, "Talk through the thought" with my friend, and I think it's made me more patient, and I've ended up hearing/saying some cool shit (or at least some funny shit) that I would've probably missed out on otherwise.