Right when you were putting the finishing touches on your PowerPoint presentation/vacation itinerary/nanny schedule, the worst happened: Your computer froze. Rather than restart your machine, try this super-simple trick.
What you do: Just like you’re taking a screenshot, hit command + shift + 4.
What will happen: The magic little keyboard shortcut overrides the spinning pinwheel of death that pops up every time your computer freezes. This gives you the chance to quickly save your doc before restarting.
And if you notice your computer freezing pretty often, try giving it a rest, as in a full shutdown. Just remember to save your PowerPoint before you do it.