We've all had an "oh poopie" moment involving liquids: Time slows down, you watch as the glass tips over, its contents cascading (beautifully, in another context perhaps) over the rim and onto the table. The rivulets of beverage roll in a miniscule tidal wave across the surface, over the edge, and drip to the floor. All in the span of a few seconds.

The worst part is when there's a computer between the cup and the table. That's when an oops becomes a crisis.

What's the best thing to do when there's a spill on your laptop? Keep calm and carry on:

1. Don't panic.

First, know that your data is safe. Hard drives -- while not hermetically sealed -- are tightly put together. If you act quickly, you can prevent the liquid from getting to your hard disk, and damaging your valuable data. (I'll save the bad news for later.)

2. Turn off the computer.

Even before you run to get a towel, turn the computer off. If you can't shut it down normally (the keyboard won't respond for example), try pressing the power button for several seconds to force the computer to shut down. Unplug the laptop, and disconnect any cables and USB devices.

3. With the lid open, turn the computer upside down.

This prevents the liquid from getting too far into the computer. While the computer is upside down, remove the battery and set it aside.

4. Wipe up the liquid.

All joking aside: use toilet paper. Ounce for ounce, it's the most absorbent material you're likely to have handy. It's also thin, so it can reach down into crevices in and around your keyboard to soak up the liquid. This is especially important for sugary drinks like colas and juice: Sugars are sticky, and if they dry, you'll have a bigger problem.

Next: If you're prepared, you can take your computer apart to clean up any liquid inside.