As I have expanded my usage of multiple systems, from the iPhone to a Mac Pro, my first focus was making sure that whenever I needed files, I could find them. Fortunately, there are a number of solutions for this challenge, and, as usual, I've picked the simplest, most elegant solution, Dropbox. I did try other systems like Apple's iDisk and SugarSync's namesake system, but problems in using either of them in terms of performance and reliability have me avoiding them. Since I decided not to use them, I'll not spend time on describing them, but in outlining my use of Dropbox, you'll see why I like the simplicity better.
Dropbox is free to use as you get started, with a starting Dropbox storage of 2GB. First, you download the Dropbox installer to your Mac or PC. After you install it, you will see a new Dropbox folder in your home directory (on a Mac) or a My Dropbox folder inside your My Documents folder (in Windows). To begin to manage a file or folder using Dropbox, simply drag it and drop it onto Dropbox.
...and that's when the magic begins!
When you drop the file or folder there, Dropbox syncs it with the cloud version of your Dropbox folder. Then, if you've installed Dropbox on other devices, those devices sync with the cloud. This means that everything in your Dropbox shows up exactly the same on all of your systems. This is true whether your systems are Mac, Linux, Windows, an iPhone/iPad, or even a mobile device with a web browser, since the cloud Dropbox is available from any browser anywhere.
As a result, I have migrated all of my active files into Dropbox. The only files that are not in Dropbox are those that are in an archive somewhere. This means that all of my systems always have the latest copy of my files available wherever I am. I even use Dropbox to sync settings between computers so that, for example, my 1password and TextExpander shortcuts are the same everywhere.
I'll mention one additional function of Dropbox in this entry: You can use it to share files and folders with others. This has come in very handy when I am working on projects with others or just want to give them access to a big file. It's easier than using a file sharing service or trying to get it to them by email: I drag the file into a shared folder or into my Public folder in Dropbox and simply right click, copy the link to the clipboard, and email that link off to them.
Check out Dropbox to make it easier to manage your files and keep your life in order between your multiple devices and let me know how it goes.