I second the curly bun idea, but my favorite updo lately has been a sort of French twist - gather hair in a low pony, then twist up and secure with a few Goody spin pins. Easy, looks good, and done in 2 minutes!
Sulfate/non-water-soluble silicone free since 8/16/10
Northern VA
Med-coarse, normal porosity, low elasticity
Dye-free since 11/2010