I took stock a few years ago. I was hammering myself to climb the career ladder, because if I did I would be able to afford a bigger car, more toys, and everybody would think I'm an all-round good egg. That ambition and drive at work wasn't compatible with a young family who didn't want to see an angry man at home every evening. I couldn't let it show at work, but took it home with me. My relationship with my wife suffered badly, though fortunately we stuck it out rather than split.
It came home to me when a dickhead in the cells was being booked in. He was a street level drug dealer who pulled a wad of cash out of his pocket and asked if I could lay my hands on that sort of money. . In an instant I realised that I had it all, a lovely house, beautiful family, a car I had paid for, I can go home every night and sleep in my own bed, I was reasonably healthy and if I needed to could legitimately raise the sort of cash he had in his pocket many many times over. I told him I was perfectly content with what I had, and pointed out that I wasn't the one in handcuffs, AND that I was seizing his cash anyway.
From that point I was able to take stock, and realise that I really was content. Striving to improve every aspect of my life and that of my family had nearly cost me all of what I already had.
Funnily enough, by being content I became more productive at work, and have been promoted since. There are times when the pressure becomes almost unbearable, but I simply remind myself of that moment in the cells, and accept that at times I will have to graft to pay for all that I have. What I don't do is muddle effort with stress. I have seen people with genuine stress symptoms, and I have seen people who are having to work harder than normal to get the job done. They are not the same thing.
Talking and sharing is a great help when things get on top. Not all of the things I have been asked to do at work have suited me entirely. After one particularly bad posting I went and spoke with one of the HR people. In minutes she had let me discuss all that I wanted to rant about, and from wanting to throw the furniture round the room and hand in my notice, I had planned what I intended to do in that new post, and how i was going to make it suit me. I thanked her for her help, and then realised that she hadn't actually said anyhting, she had simply listened. So a big thanks to everybody who is a listener.
Montage, find someone who will listen and don't be afraid or too reserved to talk about what's bothering you.