Sue Pelletier, Face2Face Meetingsnet, linked to a great "top 10" list of networking tips by Susan RoAne on Guy Kawasaki's blog.
All of these are networking tips that I didn't include in my Top 10 Networking Tips series.
The first nine are good techniques, but the tenth is about the philosophy of networking:
Go everywhere with the intention of having fun. People want to be around the upbeat, fun, interesting, and interested person.
When you show that you enjoy being with the people you are meeting, and have fun meeting people, then you'll apply these networking tips and techniques much more easily and with less stress.