If you plan a good program but nobody knows about it, you are setting yourself up for disappointment. Publicity can include posters, flyers, banners, diag boards, bus signs, newspaper display ads, direct mailings, public service announcements, etc. See Publicizing your Event and Organization for additional information. Determine the program's details. Make a list of what needs to be done before, during, and after the event.
Sample details are equipment needs, registration tables, special power hookups, etc.
Even the smallest details should be written down on a checklist. Once you have thoroughly prepared yourself for the event, determine who will implement it. In the beginning of the process, be as clear as to whom will perform what tasks and what roles and expectations everyone has of each other. Give people enough time for the responsibilities and make sure that they are within their abilities. People support what they help to create - so involve as many people as is meaningfully possible in the process.