This may be an obvious thing but thought i would point it out as it has proved very handy!
Scenario is you own a mobile PC and desktop PC but would like resources such as instruments and dsp effects to stay the same between workstations.
Go get yourself a free Ubuntu One account at one.ubuntu.com/ (5GB free)
In linux i am using a single Ubuntu One account signed in at both machines that are “Always in sync” from their “Renoise/Resources/Library” paths.
See picture:
http://ubuntuone.com/7Bc0jVoEwMlgzqUA9r9EhY
The cool thing is that the syncing happens semmlesly with no further action on your part (other than avoiding possible file name conflicts).
Plus if your machine dies then all the important stuff is safe!
Obviously this requires an internet connection however it wont hurt to store locally until it’s possible to sync.