I vary my makeup look quite a lot from day to day - it helps if you mix your hair up a bit too. Few 'looks' I've gone for recently:
Green and gold smokey eyeshadow with a nude lipstick and black eyeliner - colours from one of the urban decay vice palettes
Neutral eyeshadow (from urban decay naked 3 I think) with navy flicked eyeliner and a deep plummy lipstick (urban decay afterdark)
Softly smoked cranberry eyes - used Anastastia Beverley Hills Modern Renaissance palette - with black flicks at the top, burgundy pencil on the bottom and a matte mauve lipstick
Warm, soft orange/rusty tones (also from the modern renaissance palette) with a light lipstick
Classic black cats eyeliner with red lipstick - I use clinique pretty eyes liner and either urban decay or mac Ruby Woo for red
bold colourful eyes - mermaid colours, turquoise blending in to purple - with a nude lipstick
Purple/plum cut crease eyeshadow with mauve lips
Nude (pink toned) lips and coloured eyeliner - I have green, blue and purple.
I also vary my foundations a bit, so sometimes I use ones which are more matte and other times much lighter and more glowing. I also sometimes use highlighter, vary which blusher (I have some which are very light and others a bit more intense), and change my hairstyles quite a bit.