How many social networks does one organization need?

TechSoup's article Determining Your Social Network Needs asks the question, "When it comes to social networking, is more always better?", proposing different solutions depending on your organization's needs.

How many social networks does your organization maintain a presence on? Did you begin with an individual profile? How did you build up your presence? What would you recommend to other nonprofits just getting started with social networking?

Suggestions I would have if you are decided to have a presence on social networking sites (and advice that I am trying to keep in mind for myself)!:

1) Be willing to experiment: Don't be tied to one approach, see what works, what doesn't. Copy techniques that others use that you think work well.

2) Give it time: It takes awhile to build up a network and see results.

3) Find shortcuts: It can be a lot of work to stay on top of multiple sites so the more ways you can streamline the process, the better. Any updates you can do automatically or have update in more than one place would be a good example of that.

--Megan