Here are some really useful shortcut keys. They are worth remembering as they can save you a lot of time reaching for the mouse while you are typing your document.
Control + B: Bold
Control + I: Italics
Control + U: Underline
Control + Page Down: Next Page
Control + Page Up: Previous Page
Control + Home: Go to the top of your document
Control + End: Go to the end of your document
Control + Enter: Page Break