No one would argue that when planning an event, you cannot advertise enough. As a promoter, your prime objective should be filling up your venue in order to maximize your earnings from gate fees and sale from drinks. The golden rule I generally followed as a promoter, and that I usually give to other promoters is:
ADVERTISE YOUR EVENTS ANY AND EVERWHERE YOU POSSIBLY CAN!
With that in mind, a new feature was added to EventOrb recently, that renders your event "Instantly Portable" at least as far as the web is concerned. After creating your event on EventOrb you are now given an embeddable HTML script that shows up in your event listing that you can insert in just about any classifieds site that supports HTML posts.
The mass amount of eyeballs that Craigslist gets makes it an ideal candidate for you to post your events on, and offers a great opportunity for you to utilize the EventOrb event widget. The widget provides links to your event page, videos, photos and profile page on EventOrb merging interactivity with some high quality publicity.
As always, happy promoting!