The sharing settings menu has some decent settings in there to get started with. The ability to setup SSH access is pretty awesome (once you get the ports forwarded!) and then you can remote browse and download the file system using a terminal or an SFTP client like the awesome Transmit.
Also, screen sharing Mac to Mac is pretty damn sweet as well – had to leave my machine on today and come to work sending emails out for UKAPU. However, just enable screen sharing, open the port of the router and then I can connect from my Mac at work! Pretty slick.