It's seems like I look for this post of siderea's about once a year, and I always wish more people would link to it.  So here it is, [soc/anthro] The Recipe, Or What you don’t know about LJ/DW:

There’s a recipe. It’s a recipe for maximally useful-for-engendering-virtual-community-LJ/DW-style. I’m not sure I have it exactly down yet — this is the alpha version — but I’m pretty sure that, contrary to a lot of LJ/DW users think, it goes something like this:

Recommended Minimum Weekly Posts by Type:
0.5 diary entry
3 pointers
0.5 bleg
0.25 op ed