Because there are so many different types of networking groups for nearly every industry, do some research before signing up for one.  The networks range from simple chat rooms to lead generation.  Find the network category that you fit well in.  Also, before you register, find out how credible the network really is.  One site that is worth your while is Madison Who’s Who.  To see more information on this site visit, http://www.madisonwhoswho.com/