A former McKinsey partner shares 7 techniques that will energize you when you're feeling burnt out at work

Sometimes, you just find yourself lacking energy or motivation at work.

Rather than waste your day feeling sorry for yourself, there are a few fast and easy ways to overcome burnout at the office, says Sevenshift CEO, McKinsey senior adviser, and former McKinsey partner Caroline Webb.

Her new book, "How to Have a Good Day," is a collection of career best practices she's learned in her 16 years as a consultant.

Here are the techniques she recommends trying the next time you find yourself unable to accomplish anything at work.