Eating in twos
I like to do things symetrically. So when I eat a kit kat bar, I break off two bars at once so I can bite into them together and distribute the chocolate evenly between the left and right sides of my jaw. And if someone asks me for a bar I give them two to keep things even.
If I eat m&ms I pour a handful into my hands and eat them sorted by colour in even numbers. The colours that don't have even numbers, I'll take one away to make it even and then eat that pile separately breaking each one down the middle to evenly separate between the left and right sides of my mouth.