An honest, well-phrased question is also a contribution. Try something, and when you hit a dead-end that you can't puzzle your way out of, contribute a question. Tell us what you're trying to do, what you've tried, and what you're seeing go awry.

A good question is an opportunity for those with experience to share, and for those on the learning curve to test their understanding. A good question might help clarify misunderstanding that others are having.

Good questions are always welcome^*.

* The first time. By the n+1st time, people get tired of seeing it. Take advantage of SuperSearch as part of your research, to see if the question has already been discussed.