Beginner Looking for A Spell/Exercise to Control My Own Emotional State.

As the title implies, I'm a novice when it comes to ritual magick. Everything I'm learning is from Donald Craig's book, which is modeled after Thelema. I've always had decent control over my emotions, but now I'm developing temper flares, and it's scary. It's stemming from family/job stresses (newborn, and uncertain job security). I'm afraid I'll eventually say or do something that will be damaging to me or my family. Does anyone know a spell, or even a mental exercise to help calm or control these flares?