Sorry if this has already been posted before, but I just wanted to share this with you guys as it has really helped with my LAN games and at work. I've heard it mentioned here before on the forums by Frogboy himself, but it's pretty awesome if you haven't tried it.
Basically it lets you sync up your computer desktop to an online file storage. It's perfect for sharing files with others for LAN, or just keeping your files backed-up and accessible from anywhere. I have all my favorite "stuck-on-an-island" games uploaded to my account, so I can access them from anywhere. I don't know why nobody has thought of this before, but it's amazing.
Its a very useful application, but requires a separate install to use, so just fyi. If you don't mind that, you should really check it out.