Wear rubber gloves. Your hands will thank you. Also, put a towel under your cutting board to catch flying pits.
If you’re making a large batch, invite a friend. Pitting cherries is twice as fun when you’re complaining together. Turn it into a contest: the fastest pitter wins a cherry pie.
Freeze your pitted cherries on a baking sheet. Then bag them up. You now have summer in a freezer bag for gloomy winter months. Future you will cry with joy.