Hope you get it set up ok. Practice during and through out the season. Many people make the mistake of not doing so after the season starts.
I've always used paper tuning. It just works for me. I just got a whole new setup and started shooting broadheads out of it last week. They were nose diving and dropping about 4 inches below the target. Did a paper tune and found my knocking point was off. Good to go now. It takes practice and experience. Though it is dumb to wait until the very last second, I've had a guy in camp shoot his bow with a broadhead for the very first time a few hours before we walked into the woods. Luckily for him, I was able to get him all fixed up. He just assumed because his field points were grouping and flying great the broadheads would as well. these guys on here will get you straightened out, but you'll take flack from waiting til the last second.
Look up walk back tuning or French tuning. You can do that in under an hour and it will confirm you got your rest close to where it should be. Then go back to Youtube and look up Broadhead tuning. Even if you are going to shoot a mechanical I find that it is a good idea to Broadhead tune to a fixed blade broadhead like a Thunderhead or Muzzy. The reason is because the blades will essentially stear your arrow and make things more noticeable in your tune. Once you do that you should have your fieldpoints and broadheads shooting pretty close to the same spot.
