Every time you make a decision, you create a state of mental tension that is, in fact, stressful. 

The solution is to reduce the number of decisions you need to make by using routines. If there's something you need to do every day, do it at the same time every day. Have a routine for preparing for your day in the morning, and packing up to go home at night. Simple routines can dramatically reduce your experience of stress. 

Interest doesn't just keep you going despite fatigue, it actually replenishes your energy.  Keep in mind:

• Interesting is not the same thing as pleasant, fun, or relaxing (though they are certainly not mutually exclusive.) 
• Interesting does not have to mean effortless. So you actually don't have to "take it easy" to refill your energy.

To the tasks on your to-do list, add a specific when and where to each. Try the if-then planning (or the  "implementation intentions").

For example, "Remember to call Bob" becomes "If it is Tuesday after lunch, then I'll call Bob." This enables you to seize the critical moment and make the call, even when you are busy doing other things. 

If-then plans can help us control our emotional responses to stress. Simply decide what kind of response you would like to have instead of feeling stress, and make a plan that links your desired response to the situations that tend to raise your blood pressure.

For example, "If I see lots of emails in my inbox, then I will stay calm and relaxed," or, "If a deadline is approaching, then I will keep a cool head."

• When you have a Be-Good mindset, you expect to be able to do everything perfectly right out of the gate, and you constantly (often unconsciously) compare yourself to other people.
• A Get-Better mindset leads to self-comparison and a concern with making progress—how well are you doing today, compared with how you did yesterday, last month, or last year? 

The idea that it's the "small wins" that keep us going, particularly in the face of stressors.

It can be enormously helpful to take a moment and reflect on what you've accomplished so far before turning your attention to the challenges that remain ahead.

• Some people think of their jobs as opportunities for achievement and accomplishment—they have a promotion focus: all about maximizing gains and avoiding missed opportunities. 
• For others, doing a job well is about security, about not losing the positions they've worked so hard for. This prevention focus places the emphasis on avoiding danger, fulfilling responsibilities, and doing what feel you ought to do. It's about minimizing losses, trying to hang on to what you've got.