So you're working on your Mac, minding your own business, and up pops a scary message about "Startup Disk Full." HUH? Yep, that means you've got almost no storage space on your hard drive to put more stuff. Sound familiar?
DaisyDisk (www.daisydiskapp.com) is a great app that is very easy to use and solves just this problem. $10 from their site or the Mac App Store will make your problems go away. Make sure you empty the trash after deleting files to make sure you've got the most free space possible.