There may be "50 Ways to Leave Your Lover" according to Paul Simon, but "40 Ways to Dodge Dementia" (per chapter 13 in my book "The Great Age Reboot") is a lot better for your heart, brain, and every other part of your body.

Last year, the Lancet Commission identified the most important of these 40 ways that reduce the risk of dementia by up to 45%. And this July, a study in JAMA confirmed that even among those at high risk for cognition problems and dementia, there are steps that effectively improve cognition.

So what are the Lancet's self-care techniques to prevent dementia — and how can people already at high risk improve their brain power? Here’s the list:

• Treating high blood pressure

• Reducing (or stopping) smoking

• Correcting hearing loss with hearing aids

• Overcoming obesity

• Becoming physically active

• Stopping excessive alcohol intake

• Avoiding or successfully managing diabetes

• Getting help (from medication and/or therapy) for depression

Also noted are avoiding social isolation and exposure to air pollution and traumatic brain injury, and the importance of formal education.

And for people with early signs of dementia, the best remedies are regular moderate- to high-intensity exercise, following the MIND diet, cognitive challenges (such as playing speed of processing games or taking an art class), social engagement, and cardiovascular health monitoring (so developing problems can be addressed).

For all 40-plus of my ways to protect your brain and live longer, healthier, and younger, check out "The Great Age Reboot."