Re: How do you use coloured paintpots or other bases?
I do the same as obscuria - I use coloured ones with complementary shadows to make colours really sing and pop, and nude shades as my everyday base (I use Painterly Paint Pot almost every day).
Some examples:
I use Chartru Paint under Sharp eyeshadow for a bright yellow green pop of colour on the lid.
I use Constructivism Paint Pot around my eyes as a smudgy liner, as a base for a smokey brown look - I'll use something like Twinks over it to create depth and dimension.
Also, n_c provided links to threads that contain a lot of good examples and discussion of what you are looking for.