Simple fact: keyboard shortcuts make life easier. Once shortcuts become a habit you will never go back. Here are a few of my day-to-day keyboard shortcuts:
ALL DEVICES
Copy: Ctrl + C
Paste: Ctrl + P
Undo: Ctrl + Z
Cut: Ctrl + X
Reopen recently-closed Chrome tabs: Ctrl + Shift + T
Refresh the page: Ctrl + R
Open a web link in a new tab: Ctrl + Click Link
Search for a word/phrase on the current page: Ctrl + F
Zoom in: Ctrl and +
Zoom out: Ctrl and -
Zoom Reset: Ctrl + 0
CHROMEBOOK
Take a screenshot: Press Ctrl + Show Windows
Take a partial screenshot: Press Shift + Ctrl + Show windows
Turn on/off caps lock: Search + Alt
WINDOWS 10
Take a partial screenshot: Windows logo key + Shift + S
Pull up the entire clipboard of recent things you copied: Windows logo key + V
Looking for more or something specific? Check out the full list of Windows and Chromebook keyboard shortcuts.