Why it matters: A new study has found women are generally more productive when working in warmer temperatures, while men might perform better at colder temperatures. So if you work in an office where a "thermostat war" means temperatures can fluctuate dramatically, let everyone know scientists found the Goldilocks temperature is somewhere in the mid-70s Fahrenheit or low- to mid-20s Celsius.

Breaking a bad habit is easier if we identify something in life that is more valuable, such as giving up smoking because we love someone affected by it, writes Susan Fowler. "You can come out of the dark ages and choose to be motivated at a higher level by proactively creating the three nutriments for optimal (and sustainable) motivation: choice, connection and competence," she writes.

Feeling satisfied with your life and keeping everything in perspective can help give you a sense of confidence during challenging situations, says LaRae Quy. Body language matters, too, as the right presentation can "send the message we're confident and in control."

Research from McKinsey shows companies that thrived after the 2007-09 recession were those who had reduced debt and cut operating costs ahead of time, giving them flexibility during the downturn. Researchers suggest three questions leaders can ask as they seek to build resiliency into business models.

Leaders can be more effective when they receive encouragement from trusted people that lets them know they are supported, respected and believed in, writes Dan Rockwell.

Taking part in improvisational comedy games can help public speakers handle the unexpected, judge the mood of an audience and think on their feet, writes Jim Anderson. Improv reminds us that audiences want to connect on an emotional level with the speaker more than with the content, he writes.

Artificial intelligence and other technologies will take over some tasks now done by humans, but there is reason to believe technology will produce new jobs and opportunities, says Megan Lamberth at the Center for a New American Security. "Those at the beginning of their career will be able to learn these new skills and transition into these new careers, but many at the mid-career level will need retraining programs to break into these emerging fields," she says.

Delta is about investing, whether it's in upgraded airports in the US or in building service and relationships in Asia, says CEO Ed Bastian. Standing still is not an option, he says, as "growth is really at the core of what it takes to be a great ... company in the airline space but also as a fairly capital-intensive business."

President Donald Trump said he will not work with Democrats on a bipartisan infrastructure program if they continue to investigate his administration. He made the statement at an impromptu news conference after walking out of a meeting with House Speaker Nancy Pelosi, D-Calif., and Senate Minority Leader Chuck Schumer, D-N.Y.

Why it matters: McDonald's employees across the US went on strike today to push higher pay, labor representation and improved working conditions that will protect them from workplace harassment. McDonald's does not set wages for employees who work at the more than 90% of its locations that are operated by franchisees.