Get Dropbox

Go to dropbox.com now and get it if you regularly work on more than one computer. Dropbox does one thing really well, which is share and update versions of files among different computers. You get a folder at your user account level on your Mac or Windows computer and you drag an file you want to have access to at your other computer/s. Sure, you could easily do this by emailing it to yourself or uploading it to a web site of some kind, but this just takes all file types, up to 2 GB free, and makes the task so darn easy. Just log in to your other computer and after a little spinning of arrows the contents of your dropbox on that computer are updated. And if you are at a public computer, just go to dropbox.com, log in, and download what you need. Seriously, get it.