There are several good options for capturing screenshots and recording video screencasts. Techsmith sells two fantastic programs, Snagit and Camtasia. I have purchased both of them, but for those that don’t need that level of horsepower, Techsmith Capture is a great choice, which borrows some seasoned basic elements from Snagit and Camtasia. It can be mastered in minutes, captures both images and video (even your webcam), and then easily shares them to your free screencast.com account.
Highly recommended! Here’s a brief diddy on how to use it.