I sharpen before the season. I use a different arrow for each outing and once I have pulled them all from the quiver (4 to 6 arrows, depending on what quiver I am using), I touch them up on the diamond file and start over again. Can't be too sharp! Alot of folks don't realize how much taking a broadhead in and out of the quiver will dull it up. Last turkey season one of my friends had went the entire season without a touch up on his broadheads. After the season when he went to remove the b'heads, they were dull. Periodic touch ups are mandatory for me. Mike