I have also got home from extremely stressful days at work and popped open a few cold ones to help calm my nerves. I ocassionaly would feel a strong urge to slam one during my lunch break but I have managed to always fight that one off. But I do on a couple of ocassions during the week slam a beer or take a shot to try and ease my nerves just enough to clam my racing mind.
I used to smoke pot for the same reasons the calming effect.