Found this post on reddit. Thought it would be useful.

Keyboard Shortcuts

• CMD+Space opens the Spotlight window, which VERY quickly lets you search for files and applications to launch. It’s how I open everything.

• CMD+Q quits the application

• CMD+W closes the current window

• CMD+Shift+3 takes a whole-screen screenshot and saves it to the desktop

• CMD+Shift+4 lets you drag the mouse to save a screenshot of a portion of your screen

• Option+Right-Clicking an icon in the Dock will let you Force Quit frozen applications

• CMD+Option+Shift+Right-Clicking an icon in the Dock will REALLY let you Force Quit a frozen application pretty immediately.

• CMD+I Opens the Inspector, which shows you a file’s properties.

• Holding CMD and clicking lets you reposition items in the menubar. You can even drag them out to remove them entirely.

can read the rest on reddit.