Categorizing/Classifying Heuristics
There are as many classification schemes as there are queries -- pick what works best for you
Try to anticipate how you're likely to use something (“role” approach) before classifying
Organize from the general to the more specific, putting items into narrowest (most specific) category
Subdivide when you have new category, using the rule of 7±2 to clump material
Adapted from Ranganathan, Bliss, Dewey, Cutter, Martel, Lethbridge, and others