Most jobs are low-stress. The problem is that most people stress themselves out at their jobs regardless.

Jobs that have actual stress include things like "hostage negotiator."

I worked through college dealing cards in a casino. Half the dealers thought it was very stressful and an awful grind. The other half though it was the easiest, most care-free job in the world. Same job.

My advice is to find a job that you can leave at work. Doing an independent career thing, or starting a business, looking for people to tutor. . . these are things that will nag you when you're not doing them, as you think about how to market and get more business, etc. You should focus on something which is there when you go to work, and which you can forget about when you leave. Virtually all such jobs have little or no inherent stress other than what people put on themselves via office politics or other B.S.

Talk to someone who has given their two-week notice because they've decided to quit, often in part because of "the stress." How stressful was their work the last two weeks? It's almost always a breeze. . . not because the job has changed, but because THEY have.