Super fast way to approximately sight your bow in, with only 2 shots:
You need a solid bench rest and a 50 yard target range.
Put a small aiming dot on your target bag/block. Adjust the scope ring so it's set at the approximate speed of your arrow. You don't have to be right on (or even close, actually), but the closer you can get, the better. Take one good, careful shot with the crosshairs right on your dot, at 20 yards.
Put the bow back exactly where it was on the bench rest with the crosshairs on the same aiming dot. Then, without moving the bow, adjust the crosshairs so they are aimed at where that one arrow impacted.
Next, move the target back to 50 yards. Put an aiming dot at the top of your bag/block, or if it's a small targetl, put the aiming dot on a stick and raise it about 2 feet above the target.
Using the same 20 yard crosshair, aim at the dot and shoot. The arrow will impact low, probably as much as 2-3 feet. Again, aim at the same dot and with the bow in the rest, without moving the bow, adjust the scope ring so the lowest chevron is right on where your arrow impacted.
Lock down the ring and you will be very close to being sighted in.
Now, keep in mind this is just a fast way of getting the bow close.
In fact, you should take the time do the same thing, but with several groups of arrows at 20 and also at 50, and adjust to the center of the groups. Then recheck your sights at 30, 40 and at various distances under 20. You'd be surprised how much off you might be on that occasional rare, but very possible, 5-yard-or-under shot. Also, downhill shots out of tree stands and such need to be checked.
And of course, do shoot your broadheads and make any adjustments as necessary before you go hunting.