One of the areas I've most matured is simply asking a question when I don't understand something rather than nodding along or feeling it's an admission of personal failure. Especially in groups, this behavior is tied to realizing that "if you have a question, others probably do, too" which I see so often in my work. Problems and confusion fester because no one bothers to bring them up. And it doesn't inconvenience us, we want to help, to be asked.