If a bad drive has ever prevented your Mac from booting, then you already know how helpful it would be to have a USB flash drive that contains a bootable copy of OS X.
Courtesy of SanDisk
If you've never had a problem with booting your Mac, consider yourself lucky. You can create an emergency USB flash drive and be ready to boot your Mac on a moment's notice, instead of lamenting lost work time.
This weekend project is an easy one; you may even have all the necessary items already on hand. If you need to pick up a flash drive, they're available at most electronics and office supply stores, as well as many other retailers.
You won't need a screwdriver or any other special tools; this is a very simple starter project. If you're ready, let's get going:
Create an Emergency OS X Boot Device Using a USB Flash Drive