Want to live to be 100 years old and live well? Experts say start preparing now.

Your top focus should be avoiding self-imposed health roadblocks, as more than 80% of chronic diseases can be prevented with healthy behaviors. 

Start by staying active.

People who are physically active for about seven hours a week have a 40% risk of dying earlier than those who are active for less than 30 minutes a week. Experts say incorporate aerobic activities, strength training, and balance exercises. 

Also, eat a healthy diet and don't overeat. Research on centenarians found they traditionally eat a diet low in calories and high in veggies.

They also stop eating when they're 80% full.

Staying socially engaged also helps. One study found people with lots of social connections had a 50% greater likelihood of living longer than people with few or no social connections.

Plenty of sleep also helps, as research shows sleeping less than seven hours a night on a regular basis is linked to diabetes, heart disease, high blood pressure, stroke, depression, and an increased risk of death. 

Watch the video above for the full story.