Hit the "Ask Question" button (top left, below our logo)
2 - Title and Explanation
Type in a title for your question, and explain it a bit more (so you get better answers.) You can add some formatting to your explanation, link to websites, add pictures, everything you need to give the readers more background to better answer your question.
3 - Tags
Type in some tags to go along with your question. By adding tags to your question, you make it easier for the rest of us to find your question. You can use already existing tags, or create new tags.
4 - Submit your question
You need to log in with your OpenID account (or just your name & email) to submit your question. You can chose to be notified by email when your question get answers.