Ok, here we go:

Don’t smoke. Ever.
Avoid being exposed to passive smoking.
Don’t use chewing tobacco.
Eat fruits, especially fruits with strong colors.
Eat lots of berries.
Eat more vegetables.
Eat more nuts.
Eat beans.
Eat onions. If possible, uncooked.
Eat whole grains.
Add garlic to as many meals as you can.
Eat less sugar.
Eat less processed foods.
Go easy on the salt.