This is another play on the aging population and the increasing attention to obesity and other consequences of poor diet and lack of exercise. "The first person you see after being diagnosed with diabetes or another diet-related illness is a nutritionist," says Tony Lee, publisher of CareerCast.com. "The field is wide open." It offers a variety of employment options, from full-time work at a hospital, school or community center to private practice. Lee rates this occupation among the least stressful and predicts years of expansion as companies and policymakers take a heightened interest in preventive care to drive down overall health-care costs. The pay is $50,000 a year and up. If you are new to the health-care field, you'll need a formal four-year degree in nutrition to land a decent job. Most universities with a health-care curriculum offer such a degree. But it's a fairly new field of formal education, and if you've been in the health industry for more than 10 years as, say, a nurse, you may be able to find work as a nutritionist with a modest amount of coursework.