Here are a couple of infographics for you.  The first one is how to get a better finish on your print, featuring the ever ubiquitous Benchy.  The second talks about how to design better for 3D printing.  The first comes from Rigid.ink, the second comes from 3D Hubs.

Advanced Overview to Improve your 3D print finish Quality

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Design Rules for 3D Printing