Most of the publicity coordinator's responsibilities revolve around recruiting for the class. Here are things we've done in the past as part of advertising the Tech Squares class. Especially long items should have their own page. We don't have to do all these items every year, but most of them aren't that hard and provide some benefit. Be careful of the ASA recruitment blackout in the fall.
Announcements and calendar
See the How to update the calendar page. The front page of our website is generated from the calendar information. Try to keep the calendar and announcements in sync: if it appeared in the weekly email and was announced on Tuesday, it should also appear on the front page. (But be careful about posting personal information online; usually sanitize emails addresses (and names where appropriate) by using squares@mit.edu instead. For example, instead of "Contact Jen at jen@someplace.xyz if you are interested in coordinating rides to PDQ", for the web write "Contact squares@mit.edu if you are interested in coordinating rides...".)