In addition to Acadia's great suggestions, I would recommend trying to not have the render centered all the time. I used to have my characters right smack dab in the center of the render, and once I started deviating from this, I was finding more dynamic ways of image composition. Though if you do a lot of closeups like I tend to do, there's not too many ways around that.. :)  By no means am I an artistic genius, though. I just try to convey what I know. :D

 

Currently using Poser Pro 2012 (Display Units = feet)

AMD Phenom II 3.2ghz (6 cores)

8gb RAM

Windows 10 Pro 64bit