Simple flyer tip for those using them: don't hand out fucking flyers.
Hand out a brief one page (or one page folded into two small pages) ten paragraph or less article which addresses a common problem related to whatever service you are selling, and offers a free fix. Careful with your free fix -- you want it to be something doable, and something that doesn't cost money, but something that will require some focus and effort on the part of the reader. It also shouldn't be a comprehensive thing that totally eliminates the prospect's need for your service (duh.)
Obviously the last bit of the flyer has a brief rundown of your services, contact info and call to action.
I am doing this as we speak with a service that builds networks of related mini-sites to funnel traffic to the clients, and it is going seriously well. The tutorials I've written even include a link on our site to a mini-directory of free online services to help the clients do it themselves; I blocked the SEs from the directory to try to get the best estimate of follow-through and the rates are pretty suprising -- and the follow-ups to close ratio is one of the best I've seen in an offline campaign.
Frank