Dan Otter
Co-founder, 403bwise.com
"Don't buy a house until you can make payments and save for retirement. I bought a home 20 years ago -- in a place I didn't love -- that lost 25% of its value in three years. I had no savings and little power to change my situation."
NEXT: Improved Medigap policies
Helping retirees and technology professionals get back to work is a labor of love for these MONEY heroes.