Suggested Google extension: Window Tiler
Ctrl+Link: Hold down the Control button when you click on a link to open the link in a new tab
Ctrl+F: Find - to search on whatever page you're on - whether it's a Google Drive file or any other website
Ctrl+Alt+M: New comment in Google Docs
Ctrl+T: Opens a new tab
Ctrl+Z: Undo - whatever you did last will be undone
Click twice to highlight a word.
Click three times to highlight a line.
Control+W: to close a tab
Control+L: to highlight the URL
Control+K: creates a hyperlink
Control+2: jumps to the 2nd tab
Control+shift+T: reopens a closed tab