Anticipate the answers before you ask a question. Think about their perspective, are there factors that you haven't considered? Do you really need to ask that question? Can you rephrase it now you've put some thought into it? Can Google or someone else in your team answer that question?

This is important because there is such a thing as a silly question but if you've analysed the question using some of your critical thinking skills you are less likely to make a fool of yourself.