As you mouse over a method in the Editor, a nice tooltip (as seen in the image below) is displayed for you showing you general information about the method, parameters, overloads, possible exceptions, and other documentation pulled from the meta data about the method (including your custom comments/documentation). This video shows you how to enable the tooltip, without having to leave the keyboard.
[CTRL]+[K]+[I] Invoke Quick Info. The command is Edit.QuickInfo, in case your keybindings are different.
