depending on your coloring, you can get these under foundation sticks, in yellow and green hues, you dab them on under your eye, before putting on foundation and powder, the shade of the stick counters the shade of the dark circles. you can also use a lighter shade of powder under your eyes to brighten them. Also using some kind of night eye cream or gel for tired eyes/ dark circles will help, and dont go too heavy on the mascara, eyeliner or eyeshadow, especially in darker colors, brighter colors will brighten your eyes! Good luck!
AOL Health