oh also just remembered, it was one of the first things that was taught to me when i was learning maya.
Keep New Faces Planar and Keep Faces Together
when i work with poly's i try and keep my faces in either tris (3 sided) or quads (4 sided) it helps with rendering and smoothing down the road, although maya does handle ngons (which is faces with more than 4 sides) it's still a good habit to get into. anyways here's a screenshot of where the tool options can be found. I was working while i was reading this post lol so i just took a screenshot instead.
