The NERBs Grey shade pack – 5 colors, popularized by James DiCono after he combed it with a Neon Green shade pack to win The NERBs May 2012 Dec Wrap contest. Since then this has been one of the most popular shade packs.
Grey + Black & White 7 colors
Takes the guesswork out of finding the right best range of colors to shade with.
Madeira thread – always use Color Preserver.