I'm coming up for air after four days of computer h*ll...
Friday morning at work, our main computer wouldn't boot up. Which means none of the cash registers will boot up. Which means we're writing up receipts by hand, and have to run to the shelves to look up each price of each item. Grrr.... Long story short, I've spent the last four days on the phone with tech support, installing new hardware, installing new software, installing more new hardware, back on the phone with tech support, installing more new software... you get the idea.
So why haven't I shot myself? Because I had a backup of ALL the data. I knew eventually I'd get it all back running, and I did. Whew!
The moral of the story is back up your data, and do it regularly. Better yet, set your computer up so that it will do it for you. Because your computer WILL crash. All your email, calendars, photos, music, bookmarks, everything will be gone if you don't back up. So back up now, and then go have some chocolate for being clever enough to back up. :)