A question that is often asked is:
What produces more jobs, auditions or networking?
Well, I don't think there is a cut and dried answer to this, but I do believe that keeping contacts active, "connecting dots" as it were, and generally letting people know what you're up to, undoubtedly helps your chances.
A caveat I would add to this, is that you need to know what is considered proactive and positive, and what is considered obtrusive. Making that distinction can be difficult because what is considered proactive by some is considered obtrusive by others.
My next posts will go into this in more detail, but I think this is a good place to begin thinking about this subject.