I found
SMB-Connect, which uses the SMB-Handler device, to be very simple to setup and mount a Windows XP share. All you really have to do is edit the entry in the devs:mountlist file and providing you've entered the right IP addresses, user name and password, you should be up and running very quickly. (There's a GUI included but I prefer to use the command line) It works fine with Miami.
I also use FTPMount ("FTPMount.lha" v1.4 on Aminet) to mount my private FTP site as part of the filesystem.
All these methods should be simple to setup if you have a bit of experience with home networking/file sharing.