Here are the top five tips I would volunteer if asked about pigments:
1. Know the names and brands of the pigments on your palette. Painters say "I'm using Sennelier Permanent Alizarin Crimson", not "uuhhh...that's some kind of red..."
Build your palette around a wide range of primary colors (reds, yellows
and blues) and a few secondary colors (violets, greens and oranges.) If
you have a wide range of primaries, you can mix just about any
secondary or neutral color ("neutrals" are blacks, browns and greys).
Make charts that show all of your pigments, both fully saturated
(strong, pure color) and as tints (mixed with water if watercolor, and
with white if oils). Until
you're familiar with the value range of your colors, refer to these charts when you paint.