Want to live to be 100? Here’s how to increase your odds that you’ll celebrate your centennial:

Once a week: Weigh yourself. University of Alabama researchers say it’s the easiest, cheapest health screening ever. Especially since people with the most body fat – a body mass index of 45 – live an average 8 years less than normal-weight people.

Next, five days a week: Eat nuts. Nuts are high in “good” fats, like heart-healthy omega-3 fatty acids.  And can add 2 years to your life. But many nuts are high in calories, so try pistachios – which are 160 calories for about 50 nuts.

Another tip for reaching your 100th birthday: Every year: Get a mammogram. A recent study review by the University of Michigan found that if all women began yearly mammograms at age 40, 71% more lives would be saved.  That means, 10,000 fewer women would die of breast cancer every year.

Finally: Every 5 years: Check your cholesterol. Heart disease is the leading cause of death.  And reducing high cholesterol can increase your lifespan by more than 6 years. Your best bet: Avoid saturated fat from butter, meats and full-fat dairy.  Cut back on simple carbs, like candy and white bread.  And eat more good-for-you fats like olive oil, and cold-water fatty fish for omega-3 fatty acids, like wild salmon.