From the Stu Maschwitz Twitter stream, in response to a Photoshop user who asked, "where to begin to do Colorista type 3way L/G/G adjustments":
#Colorista tip 1: You can think of the three trackballs as a GUI for PS Levels. Lift is like in/out black, Gain is i/o white, gamma = gamma.
#Colorista tip 2: The stuff in The DV Rebel's Guide about push/pull grading with Rebel CC holds even more true with Colorista.
#Colorista tip 3: Watch this! ...