Get Jing here: http://www.techsmith.com/jing-features.html
So, I know there are tons of screen capturing software options out there, but I really enjoy using Jing for a few reasons. #1, it's free. (You know how I feel about free stuff!) #2, it's simple! You can install it quickly, and use it with ease! When you want to do a screen capture, you simply click on the little sun icon that hides at the top of your screen, then drag your cursor to select a rectangle portion of your screen, and then a dialogue box pops up asking you what you want to do with it! You can save that portion of the screen as an image, or you can use that portion of your screen to start recording a screen-cast, and lots more! Check out the link at the beginning of this post to start exploring the possibilities of what easy screen capturing can do for you.