For Marie Tillman, success means transcending the limits of finite resources and empowering people to use their skills in new ways.

She is the founder and CEO of Mac & Mia, a children’s clothing subscription service that was inspired by her experience as a working mother of five children ages 3 to 16.

She is also the co-founder and president of the Pat Tillman Foundation. Named for her first husband, a former NFL player who was killed in Afghanistan in 2004 while he was serving in the U.S. Army, the nonprofit provides academic scholarships to military veterans and their spouses.

Related: This Entrepreneur Who Sold Her Company for $1 Billion Wants You to Throw Out the Unwritten Rules That Hold You BackThe two organizations could not seem more different -- one is about helping veterans create n...

The stress of doing your schoolwork, playing a sport and finding time for family and friends is taxing enough during your teenage years. Throw in managing a business, and it gets pretty crazy!

I founded HoopSwagg when I was 13 years old, and had no idea what the next years would have in store for me. By the time I was 17, I had grown HoopSwagg into a seven-figure business while getting straight A’s in high school and playing a sport four nights a week.

Having my own business was in some ways much better than any other job a normal teenager would get, but it didn’t come without hard work and strategic planning. Here are eight habits I acquired that helped me to grow a seven-figure business by age 17.

Running a business is already difficult. Add in school, and you’ll ...