You know what, I've discovered that helps a lot. On one of my chapters, I realized that every character had this thing about putting their hand on this specific character's shoulder... Like, all the time. Constantly. And these were all male characters too. Males can try to comfort another, but not like that, or at least not like that all the time.
The repetitiveness of it all ended up annoying me and I believe I cut every instance of it from the chapter. And if I didn't, I cut enough of it out that if any instance did remain, it read more natural and I didn't notice it. (I did just read this chapter recently, so I know.)
But, yeah. You have to watch the repetitive words and actions. There's always one. You find it, kick it out, then you realize you've replaced it with another repetitive. One thing on the repetitives, use them to try writing something unique instead of allowing yourself to fall back into those traps. For my characters placing a hand on that one character's shoulder, it became them just saying something, or doing something entirely different. Some of the replaced action went toward showing more about the character in other ways, like personality and such, and how they truly handled stressful situations.