I will go with something less obvious, i.e. isometric neck training. These exercises come from a Polish coach based in UK, Andrzej "Wodyn" Roszkowski. All exercises are done 3x5s. Perform before a training session. Keep packed neck during all exercises.
Exercise 1: Put both hands on the back of your head, elbows facing forward. Push on your head. Resist with the base of your skull, tucking your chin.
Exercise 2: put the base of your palms on your eyebrows, elbows facing forward. Push and resist with your neck.
Exercise 3: place one hand with the base of your palm behind right behind your ear, fingers parallel to the ground, elbow flared to one side. Push, resist with your neck. Do on both sides.
Exercise 4: Place one hand as in exercise 3. Clench a fist of the other hand and place it on your chin from the other side. Press with your hands as if you wanted to twist your neck, but resist with your neck (hopefully).
Here's a video explaining why and how to train the neck. It's in Polish, but I put it here to give the credit when the credit is due.
If it's too convoluted a description let me know, I will clarify.
Besides that I like performing a
modified neck bridge, but only the back version - the front one causes pain for me.
Another exercise come from a Polish PT, Marek Purczyński. I call it a spiral plank.
Here is a link of a video with a tutorial. It's in Polish again , but the visuals are enough to understand it - reflexive tension will do its job. It can be done with a 90 degree bent in your knee (easier) or with straight legs (harder). If you feel a stretch while folding in this particular fashion, spend some time performing just the stretch without lifting your stomach from the ground (that's suggested by the author).
More obvious stuff:
- dead bugs, but with the head pressing into the ground, legs straight, actively digging the heel of the down leg into the ground. I find it to work more on the deep abs than the "traditional" dead bug that gives you a burn in the superficial musculature.
- copehhagen planks
- bird dogs
- side planks