1. Start the day with a protein breakfast designed to give you more energy.
For energy and brain power always go for protein like a couple of scrambled eggs and some stir-fried dark greens like spinach or mustard greens. (Kale if you like it, which I don't. *g*) For more protein power, add a few chopped nuts or pumpkin seeds of your choice.
2. Work under bright white light when you need to be your most productive, and when you need to be creative and a problem-solver, go for blue-tinted lights.
You probably can't change the overhead lighting, but you can buy a cheap desk lamp and a blue bulb.
3. Focus on one task at a time instead of trying to multi-task.
Studies have shown that people are actually less efficient when they're trying to multi-task. Instead, focus your attention on one task at a time. Set your cell phone alarm for 20 to 40 minutes, whatever block of time you have, and work only on one thing. Take a break and do other tasks for a small block of time then go back to the one task you needed to focus on. You'll be surprised how quickly you can get that one thing done, and you won't feel stressed out either!
There are many tricks to getting the most out of your time and energy. These 3 work. Give them a try.