I also belong to and keep track of multiple groups: bookkeeping, entrepreneur, my niche industries, my client's industries, and local
Meetup social groups as well as linked in, etc. As with Tess, I try to keep up on my client's industry trends even though I focus on bookkeeping so that I can speak intelligently with my clients but also be aware of changes that may affect their bookkeeping practices.
I try to spend NO MORE THAN an hour/day checking on my various groups, though as otherwise I could spend all of my time doing that instead of working.