My first job with Walmart was unloading trucks in a warehouse. Then I worked as an assistant manager in a store, and I was lucky enough to get into our buyer-training program. I loved merchandising and had a career path that led me through Sam's Club and Walmart International.

Volunteer for something extra, volunteer for something hard. One of the reasons that I got the opportunities that I got was that I would raise my hand when my boss was out of town and he or she was visiting stores or something, and someone needed to pinch hit and go to a meeting, I would go, and if I knew the answer to the question that came up, I'd share it, if I didn't, I'd say, "I don't know, but I'll find out fast and get back to you." I then put myself in an environment where I became a low risk promotion because people had already seen me do the job.

As I look across our company, we have everything from store associates to supply chain associates. Of the 2.1 million people (globally), something less than 75,000 of them are home office jobs. All the other ones are working in a store, a club, a distribution center. And I think those jobs change more gradually. We are still going to want to serve customers and members with people. The change as it relates to the home office jobs probably happens faster.

I think no one knows how this is going to play out exactly. And the way it feels to me is that basically every job gets changed. And I think the best way to think about it is getting "plussed up." So how can I lean in the role that I have, regardless what that role is, to adopt new tools, leverage them and make things better than they would've otherwise been?

Don't take your current job for granted; the next job doesn't come if you don't do the one you've got, well.

Today, Walmart employs about 2.1 million associates. The vast majority of our management team started as an hourly, just like I did. If you walked around here, not just here in Arkansas, but around our company, you would find a lot of people with more than 20 years of service, and you'd find a lot of people who've joined the company to climb up the ladder and create opportunities for themselves.