This is a quick tip / tutorial that I find works in most cases - Tweaking a few Render Settings yields some pretty sped up render times! Particularly with Ray Depth, Reflection Depth, and Shadow Depth-
and don't mind my dyslexia at the end ;) it is 6, 2, 6
let me know if it's a useful tip, should I share more?
follow @ Twitter.com/capricorn8