Although many people worry about their weight, very few — only 20% — follow any structured weight plan, and 76% admit that they don’t know how to eat to lose weight. That’s what HealthFocus International learned in a 2012 study, “Actionable Solutions for Overweight Segments of the Population.”

What’s the step people are most likely to take? “Drinking more water” is what they said, according to the St. Petersburg, FL-based consumer research firm. Almost as many people get information on weight loss from Facebook as from weightwatchers.com.

The HealthFocus study grouped consumers into five different population segments: active maintainers, emotional seekers, practical reducers, health driven and nonchalants.