I love to make my own nail polishes by mixing pigments with nail polish. Recently I discovered a little trick.

Most people mix it on a paper plate or on something flat and disposable. I find that the mixture moves around too much and dries out too fast. Something welled works much better. 

I started using empty gum packages. 

I find this method much cleaner, faster and you don't waist as much or have to risk putting the brush back into the bottle to get more polish.

steps:

1. scoop pigment into empty well

2. poor desired amount of polish into well

3. mix

4 paint.

5. clean brush with some polish remover and put back into bottle

All Done! Easy and fast. 

Here is a great video by Dusty Hunter on Pigments in hair and nails: