I also have all my characters and frequently-used-stuff saved as carrara scenes that import nicely. Saves time, etc and is really, sort of, the same as a duplicate command.

I have low res snapshots of each available set up saved in a quick-viewing file so I can flip through them like a photo album to pick and choose what I want to go into a scene.

Fenric's stuff? How did I ever use Carrara without it?!