Here are some things that may help reduce the risk of cognitive decline and Alzheimer’s Disease:

Suggestions from Dr. Weil: Staying mentally challenged (more here here, here, and here), taking low-dose aspirin, use healing spices like turmeric (more here and here) in cooking, eating a diet rich in omega-3s (more here), eating plenty of fresh fruits and vegetables, and avoiding polyunsaturated vegetable oils;

RealAge.com’s recommendaions: Exercise (more here, here, here, here, here, here, and here, especially aerobic exercise - to develop aerobic fitness, and most especially exercising outdoors), not smoking, getting enough sleep (more here and here), keeping blood pressure within normal limits, taking classes, keeping body weight within normal limits;

Dealing with minor ailments rather than letting them pile up;

Healthy living (getting enough exercise, keeping blood pressure and body weight within normal levels, and not smoking--more here);

MAKS treatment - Motor stimulation, practicing daily living Activities, cognitive stimulation (K, more here), and Spiritual activities;

Keeping cholesterol within normal limits;

Eating a Mediterranean style diet (more here), especially when combined with exercise;

Eating carrots, beets, asparagus, blueberries, pomegranates, and tomatoes;

Eating fish - at least once a week (more here) - or taking a fish oil supplement or getting enough omega-3 fatty acids from other sources, along with vitamins B, C, D and E, including olive oil and nuts;

Getting enough vitamin B-12 (more here, here and here), folate, dietary choline (found in foods like saltwater fish, eggs, liver, chicken, milk and certain legumes, including soy and kidney beans--more here) and vitamin D (more here);

Drinking coffee and tea, especially coffee;

Reducing salt in the diet if you’re inactive;

Reducing the accumulation of iron in the body,

Taking grape seed extract or drinking red wine (more here, but you can also get the resveratrol that is in red grapes and red wine from a food supplement);

Minimizing stress, including remaining calm when under stress;

Getting enough sleep;

Performing routine chores;

Socializing (more here, here, and here);

Developing spirituality, especially by practicing meditation;

Spending time in green areas;

Mindfulness therapy;

Mental agility training;

Continuing one's education, especially learning a new language;

Developing a sense of control over one's life (more here), a sense of efficacy;

Taking huperzine A;

Using an insulin nasal spray;

Avoiding allergy medications and sleep aids containing diphenhydramine;

Avoiding surgery with anesthesia, if possible;

Moderate drinking (more here);

Avoiding overeating and keeping weight down, especially minimizing fat accumulation;

Keeping arteries clear

Avoiding diabetes (especially when combined with depression), heart disease (more here), and other inflammatory diseases; and

Avoiding air pollution.