Click 'Start a topic' then click the 'Start a Poll' link. (located at the top right of the new topic fields).
If you're an admin, you add a poll to the sidebar. Click 'Forum Admin', then 'Widgets' and drag the poll widget from the left to right. Click 'Edit' to select which poll to display on your sidebar (you must have at least one poll already created).
Be sure to check out our