Ask Slashdot: How do you Start a User's Group?

Steen Suder wants some answers to this interesting question: "A couple of friends and I are talking about starting a LUG. Now we're discussing what to do and what's important. Mailing lists, homepage, facilities, budget, locations, meetings, etc. What are the important things to remember when starting a Linux User's Group?"

I figure quite a few answers to this question will be useful for any type of User's Group. While, specific answers dealing with LINUX User's Groups will be appreciated, let's try to keep responses as generic as we can. I'm sure users of other platforms interested in starting their own User's Groups will appreciate this as well.