I just started using this new program called Dropbox. It’s the simplest way I’ve found to keep your files synchronized between multiple computers, and it works on Windows, Mac, and Linux.
On each computer that you install it, a “Dropbox” folder is created. Just copy the files you want kept into that folder, and they will be uploaded to Dropbox’s online repository. (There’s a limit of 5 GB of storage.) The files can be accessed online or by any other computer (after logging in). There are also specialized “Photo” and “Public” folders, which you can share the URLs for with others. The photos can be viewed as an online gallery, and public files can be downloaded by others.
The files are all encrypted and the connection to the repository is encrypted while uploading. Dropbox also keeps revision information, so you can revert to older versions of files after they’ve been changed, too. And, it’s a completely free service!