You do not need to spend money to improve productivity on your Macintosh: you can do it easily by following a few simple Mac keyboard shortcuts. Memorise two or three of these and you will work much faster and impress friends with your computer savvy.
With keyboard shortcuts, you press a combination of keys and your computer executes a menu command. Cutting, copying and pasting is a good example. One would normally go to the edit menu and select one of these actions.