Our next tip is somewhat of a classic, and should, in fact, be well-known. Despite this, the question of how to snap a screenshot of a program window, or even the entire desktop, keeps popping up.
While the first instinct might be to look for additional programs to answer this question, Windows 7 (and indeed earlier versions of Windows as well) has an integrated screenshot function. Use the key combination [ALT] + [Print Scrn] to save a screenshot of the active window to the clipboard. Then paste it, for example, directly into an e-mail in Outlook. A screenshot of the entire monitor is created by simply pressing the Print Scrn key, once again saving the screenshot to the clipboard for further use.
In case you are looking for a fast way of only saving certain areas of the desktop to the screenshot, you can use Windows' integrated Snipping Tool.