I have always provided an assortment of images to help promote the events I do. I just finished creating a new tool to make it even easier to create promotional fliers. You just enter your event details and click the button. Your customized flier will be created and downloaded in PDF format, ready for you to print out to promote your event.
Let me know if you find this useful, and if there is anything I can do to make it work beter for you.
The tool is available on my Promotional Downloads Page.