If you buy any Bare Escentuals products besides the foundation, Well-Rested and Bisque should be the two you buy. They conceal, provide a base, and perfect the complexion, while treating your skin with pure minerals. Bare Escentuals was the first company to make pure mineral make-up, and they are still the best.
Bisque started its life as an eyeshadow, but is now sold in a larger container as a concealer, and comes in three shades: Original, Summer (for a light tan look), and Honey (for tan to dark skin). I use the Original, because my skin is very pale and doesn't tan. I use it over my foundation for the little age spots that are beginning to appear on my skin, and for an annoying freckle that adorns my chin. When lupus flares, I use it under foundation to cover the "butterfly rash" and may add a little more over the top of foundation when the rash is really bad. It was hard for me to believe that a light, sheer powder could cover that rash, but it does, and it stays put for hours if I "swirl, tap, and buff" with the Maximum Concealer Brush ($20, and well worth it).
Well-Rested also started out as an eyeshadow, in a .02 ounce size for $12, but now comes in a larger, .03 ounce jar for $18. It is a neutral color which can be used alone to give a "no eye shadow" but, as its name implies, well-rested look. It can also be used under other eye colors, and is especially useful if you have visible veins in your eyelids or that bruised look that can come with fatigue. It disappears under other colors, but covers what you want it to.
I give these products a 5 of 5; they are everything they promise to be.