I love Clinique's duo eye shadows. They come in great colours (I really like Lovey Dovey right now). They take their most popular shades and match them up perfectly with each other and they come in a nice compact case.

To use the website says: Apply dry, using sponge-tip applicator or cotton swab. Apply lighter shade from lash line to brows; use deeper shade in crease. Remove with eye makeup solvent.