Here are a few keyboard shortcuts that will make a lot of day to day operations easier and faster.

CTRL + A - Select All

CTRL + C - Copy Selected Text or File

CTRL + X - Cut Selected Text or File

CTRL + V - Paste Text or File

CTRL + Z - Undo last Action

CTRL + B - Make Selected Text Bold

CTRL + I - Make Selected Text Italic

CTRL + U - Underline Selected Text

CTRL + E - Align Selected Text to the Center

CTRL + R - Align Selected Text to the Right

CTRL + L - Align Selected Text to the Left

CTRL + J - Align Selected Text to the Justified