marketing information
Do You Have A Promotion Plan?
360 Degree Marketing
Top 10 ways to advertise your business for free

online marketing
9 Inexpensive Ways to Get Your Business Noticed Online
Online Marketing

guerrilla marketing, etc.
10 Unusual Ways to Advertise
So… What is Guerrilla Marketing? An 8-Part Guide to the History and Approaches to Guerrilla Marketing
The 80 Best Guerilla Marketing Ideas I’ve Ever Seen (this entire site is great!)

direct mail
99 Tips for Direct-Mail Marketing
United States Postal Service: Calculate Postage

signage and other environmental graphics
Society for Environmental Graphic Design Awards
vmsd. design galleries

collateral system
50+ Examples of Well-Designed Brochure Design
22 Beautiful Examples of Brochure Design