I love making hats. You can whip'm up in about two hours. A LOT of people were blessed with hats for Christmas this year! :) I forget where I got my basic pattern, but it's similar to Kim's Hats in Last-Minute Knitted Gifts by Joelle Hoverson.
My professors never ceased to be amazed that I could complete a whole beanie during our Plasma Diagnostics class this semester. ;) (YES, I paid attention! YES, I passed!)