Taking screenshots is one of the most useful features on a computer. Mac makes it really easy to do with cmd+shift+4 and by default this saves it on the desktop.
To change this make it save into a folder, make a new folder and call it something like “Screenshot”. Then open a terminal command and type the following:
>> defaults write com.apple.screencapture location /Users/sean/Screenshot
That is all there is to it.
Another tip is that you can take a screenshot to the clipboard by typing cmd+shift+ctrl+4. Then you can paste the screenshot directly into another application!