As mentioned earlier, there are a few online solutions that one can use for coordinating data between a desktop and a laptop. These are mostly for the Windows operating system, but I've also thrown in some information about Macs too.
Microsoft's Sky Drive - Sky Drive is an online storage area offered by Microsoft for Windows users. To get Sky Drive, all you need is either a hotmail, msn, or live.com email address. Sky Drive lets you upload files, pictures, and even music to an online space, offering free 25GB of space. The upside to this is that you can upload files from one computer and access those files from any computer by just using your email address. There's also the added advantage of working on the file from the new web versions of Office that let you view, edit, and delete files from a web interface of say Word or Excel. The downside is that although you have the ability of sending a piece of work to Sky Drive within Office 2010, unless you remember to do that, any changes made to the file on one computer (the desktop) will not be reflected on the other (the laptop).
Microsoft's Live Sync - To go with Sky Drive and the other new online solutions from Microsoft, there is Live Sync. Live Sync is the updated name for folder sync, a piece of software that allowed the syncing of files from one computer to another. It's like having a server on your computers - if you add a file to Live Sync and work on it on your laptop, as long as you have Live Sync on your desktop, that file will reflect any changes or edits that have been made to it. The software is free and takes only a few minutes to set up. The downside to this - as with any online solution - is the potential for someone else finding out how to get in. Like Sky Drive, you need a Microsoft email address; if a hacker discovers what your password is, not only is your email at stake, but so is anything that's linked to that password.
File Synchronization (Mac computers) - Not to worry, Mac users, you can file sync your folders too with Apple's File Synchronization. Like Live Sync, Apple's version allows for updated files and documents to be synced from a desktop to a laptop, and is free to download from Apple's website.