Let's throw a few tips and tricks in here for those getting started.
First off: RENDER SETTINGS:
A few findings from @Fastbee:
I'll also add a couple of things I've learned can make your renders faster:
Redshift's unified sampler definitely benefits from applying sampling overrides. Allocating sample overrides prevents the unified sampler from getting overworked by trying to clean up stuff like reflections, refractions, etc. So...