My friend Lynda Hinkle posted here that it is a good idea to get a will in the new year. I wholeheartedly agree.
This document is increasingly easy to get at an increasingly low price, either from sites like LegalZoom or from an attorney. Depending on your needs it can be very simple to have one drafted as well.
Even if you don't have much, it really helps to have a will because it makes the process much less cumbersome for your family, and reduces the stress that goes along with the whole grieving process.