What are good neck stretches?

Clara X.
Any yoga routine or move that requires you to stretch your arms over or behind your head. Like lifting your right and over your head and pulling your head to the left. Or, doing a seated forward fold while pulling on your legs to round your back and neck is my favorite.

Aditya E.
Keep your head squarely over your shoulders and your back straight.
Slowly turn your head to the right until you feel a stretch in the side of your neck and shoulder.
Hold the stretch for 15-30 seconds, and then slowly turn your head forward again.
Repeat on your left side. Do up to 10 sets.

Sofia Z.
Honestly I never thought about it, but now that I am, I would say spinning the head in slow circles to the right and then to left. I also think having a good posture and keeping your back straight helps.