One way is to just email the files as attachments to myself using Gmail and then download the attachment on the other computer.  That’s not a bad method, fast and efficient but is limited to the 20MB file size imposed by Gmail.

DropBox  is just about the easiest way I know of, to keep a folder of files in sync between two computers. I’ve been using DropBox throughout its private beta but now the beta is open and anyone can get an account.  Just sign-up for the service and download a client application for each the computers you want to keep in sync and you’re in business.

A DropBox folder looks like any other folder on you system.

You can drag and drop any file into your DropBox folder and it will be automatically copied to any other computer you have installed the DropBox software.  If you want to copy the files to a computer other than one with software installed, there is a web interface from which you can login-in and download.

A free account on DropBox gives you 2 gigabytes of file space. You will be be able to buy a 50GB Dropbox for $9.99/month, or $99.99/year if you need more space.  Client software is available for Windows, Mac and Linux, so you can keep in sync any of those types of computers as well, of course, Windows and Windows, Mac and Mac.