To prevent fishtailing in archery, you can do several exercises and drills. One of the most effective is to work on your grip strength. A weak grip can cause your bow hand to move during the release, leading to fishtailing. Another helpful drill is to focus on your follow-through technique. If you don’t maintain a steady aim after release, it can also cause fishtailing. Practicing with a stabilizer can also help reduce this effect by minimizing any unwanted movement in your bow hand. Finally, ensure you’re using proper form and technique when shooting, which will also help prevent fishtailing.