After you click the "Post New Thread" button, when you are in the screen where you enter in the text for the post, down towards the bottom of the page there is an "Additional Options" area. The last or 2nd to last option is "Post a Poll"..you checkmark the "Yes" box and input the number of poll options. Then you click the "Submit New Thread" button, and it will take you to a screen where you can input the text for the poll options.