Oops, first thing: the forum interface for Android is borked.
Ok then. I was hoping to get everyone's animation tips and tricks into this thread, here's my first:
Use yon/hither settings to slice OpenGL preview renders to create depth of field effects. Just create a slice for instance for the fore, middle, and distance, and anything in between that you need in a shot but can't 'afford' the render time in Firefly. For me this is actually preferable after using it for a few days, I can adjust layers of the shot independently, deal with bad Firefly frames, time, and control over blur and the general quality of it. Depending on the shot, you can do as many slices as you need.