Stress is a fact of life in the business world, but, by taking the right approach, you can deal with it in a productive manner, Heidi Grant Halvorson writes. It's important to reserve some of your time for an interesting task and to get into a routine that allows you to reduce the number of decisions that you have to make on a daily basis. "Every time you make a decision ... you create a state of mental tension that is, in fact, stressful," Halvorson writes.