Image by Remko van Dokkum.
Shortcuts You Should Know
If you’re still doing these things the long mouse-driven way, stop!
Alt + F2: Open a “Run application” window
Ctrl + Alt + L: Lock the screen
Ctrl + Alt + T: Open a terminal window
Ctrl + Alt + D: Minimize all windows and show the desktop
Ctrl + Alt + arrow key: Switch to a different workspace
Make Your Own Keyboard Shortcut
If you always find yourself doing the same task or opening the same program, it might be worth making a custom keyboard shortcut.
Open the shortcut configuration tool via System –> Preferences –> Keyboard Shortcuts.
Read more: How-to-geek