Low-poly modeling

I'm having a hard time finding good resources online for low-polygon modeling techniques. Back when I first looked into this topic ages ago, I remember a few web sites that went into some tricks that I wish I could find now.

In particular, I'm looking for resources that have a good discussion of how to architect your models so that when bones deform them, you don't get nasty creases. I seem to recall that a major factor in having a good model that deforms gracefully is to have the geometry model the anatomical musculature of the entity being modeled. But I want examples.

I also need some good pointers on setting up a bones structure. How many bones do I need, and what are the guidelines for placing them in the figure? And why do some sites mention adding a tiny little bone at the end of every skeletal structure?

I'm plugging along on these issues, and I'm making progress, but I'm getting somewhat frustrated by the lack of good materials to help me online - there are plenty of modeling tutorials aimed at the modeling neophyte, but precious few on rigging. Maybe I'm just not finding them. If I ever master this stuff, or even get good enough at it to achieve decent results, I may have to write some tutorials of my own.