Above all, remember that everyone has to start somewhere. So someone does not do a search of topics, or they ask a question that someone takes as stupid, or someone offers information that is seen as "unnecessary". Just point them in the direction to where things might have already been answered. No need to be nasty...ever.

On questions that are considered "stupid"; the stupid question is the one that is not asked. You'd be surprised how many others want the answer to that exact same question but would not ask it for fear of being jumped on.

At the end of the day, we are all here to help (hopefully). We will all trip up, but we don't want to make too much of a habit of it