I take screenshots… lots and lots of screen shots. I use them to backup settings on configuration screens when I make changes to computers, just as an example. However, the built-in Windows tools for taking screenshots are sorely lacking.
I have started using Greenshot last week, and so far am very impressed. It is easy to use, does 100% of what I need on a day to day basis. Did I mention it was FREE? It is published under the GPL, a free software license model.
If you have to make screenshots with any regularity, give it a try!