I adore a good subplot! I tend to write episodically - I think I'd get bored otherwise - and in my WiP I basically have about 6 strands that narrow to 3. I learnt many of those basic techniques of Stephen King. I think it became part of my psyche as a boy.
My sub-plots are very strongly connected to the main plot, supporting it by providing an 'outside eye' that would just not be possible to convey through the MC's viewpoint. Kind of like, you know what's going on as the reader, while he doesn't.
It's fun to do, especially when you're trying to make the reader hold their breath about certain character encounters, but it can be difficult to manage at times, and I would love to write something more linear at some point.
JB
<Added>Oh, and I never skip bits. When people say they've 'skipped bits', it sets my teeth on edge.