OK this is my third year of bowhunting. Nobody else in my fam is really seasoned hunters so I've been kinda stumbling around learning as I go through trial and error. I hear the terms "tuning broadheads" on here so often.

I practice with my field tips and then I switch to my slick tricks on opening day. How exactly do you "tune" a broadhead to get a better flight? Could someone please explain this to me and maybe offer a few suggetions on what I could do to make me a little more accurate on opening day?

It refers to getting them to hit the same point of impact as your field tips.

Skip ahead to broadhead tuning section in the Easton Tuning Guide.
http://www.eastonarchery.com/pdf/tuning_guide.pdf