Personally I'm a huge fan of Twitter because it has a great community of writers and I enjoy using Facebook to keep in touch with relatives across the ocean, but I haven't really gotten into any other social media networks yet.
i treat an online venture just like any legitimate business. in order to make serious money you need to invest a little bit. you need to test a little bit. you need to tweak a little bit. please read entirely and advise me in the path i should travel. i have real world experience in a niche. this industry requires leads to survive. i want to start a lead generation business. i want to build a site, go live, pay for traffic, get opt-ins, and direct the opt ins to people who "rent" from me...(more on that later)