Get moving. Inactivity is linked to greater Alzheimer's risk, so take a daily walk. Walking every day can prevent your brain from shrinking, too. Find out how many miles you need to log to avoid shrinkage.

Don't smoke. If you do, quit. Smoking may up the likelihood of developing Alzheimer's disease.

Eat more bananas. The potassium in this cheap and plentiful year-round fruit can help lower your blood pressure by as much as two to three points! And low blood pressure at middle age may help prevent Alzheimer's disease.

Go to bed. Getting a good night's sleep can lower your risk of type 2 diabetes, so get your ZZZs because new research suggests that developing type 2 diabetes may up your chances of getting Alzheimer's.

Walk outside. People who exercise outside -- versus at the gym or inside the home -- have less depression. That's good news for the brain, because depression may increase the risk of Alzheimer's.

Take a class. Higher education is linked to lower rates of Alzheimer's.

Drop a few. Becoming obese at middle age may be connected to higher Alzheimer's risk.