Action: Cut or copy and paste
Mac: Apple + X, Apple + C, and Apple + V
PC: Ctrl + X, Ctrl + C, and Ctrl + V
Why they help: Almost everyone's first set of shortcuts eliminates two to four mouse clicks.
Action: Select All
Mac: Apple + A
PC: Ctrl + A
Why it helps: Before you cut, copy, or delete, you must select.
Action: Find and replace
Mac: Apple + F
PC: Ctrl + F
Why it helps: If you spell "recommend" with two "c's" in a document repeatedly, you only need to fix it once. You can also find text in a document or a web page without having to read.
Action: Toggle between applications
Mac: Apple + Tab
PC: Alt + Tab
Why it helps: Multi-tasking takes on a new meaning when it's only one click between tasks.
Action: Take a screenshot
Mac: Apple + Shift + 3
PC: Print screen then paste (Ctrl + V) into a document
Why it helps: Instant examples in your greeting cards and presentations!
Action: Move through fields on a website form
Any platform or browser: Tab/Shift + Tab
Why it helps: You can register for a website, apply for a job, and more without touching your mouse.
Action: Force quit
Mac: Apple + Alt + Escape
PC: Ctrl + Alt + Delete
Why it helps: A computer meltdown doesn't have to be a real-world time suck.