Here are the 10 ways.

1. Moderate your alcohol consumption: drinking alcohol increases the risks of cancers of the pharynx, mouth, larynx, rectum, esophagus, colon, and liver. Women should limit themselves to one alcoholic beverage per day. Men should limit themselves to two.

2. Eat plenty of raw fruits and vegetables: The American Cancer Society recommendation is to eat five servings of fruits and vegetables daily since they are loaded with vitamins, minerals, antioxidants and other substances that decrease the risk of cancer. Recent studies have shown that the connection between eating vegetables and fruits and lower risk of cancer risk isn’t as strong as once thought. However the majority of researchers still subscribe to the idea that a plant-based diet is one of the best ways to secure overall health.

3. Think about chemoprevention: Chemoprevention is using natural or synthetic compounds to reduce the cancer risk or recurrence. Tamoxifen, prescribed to prevent breast cancer in women, is the most famous chemoprevention agent. The downside: chemoprevention drugs may have serious side effects.

4. Decrease the amount of fat in your diet: Studies suggest that high-fat diets are linked to several types of cancer, including postmenopausal breast, colon, and lung cancer. High-fat diets are usually high in calories and increase the risk of obesity. More study is required to understand which types of fat should be avoided and what amount effects cancer risk.

5. Stay within your ideal weight zone: Being overweight will tend to increase the risk of postmenopausal breast cancer as well as cancers of the endometrium, colon, esophagus and kidney. There have been studies showing that obesity increases the risk of cancers of the prostate, liver, stomach, gallbladder, pancreas, ovary and cervix. Some studies estimate that excess weight is a factor in 15 to 20 percent of cancer-related deaths.

6. Get screening exams: Pap tests, mammograms, colonoscopies and other routine screenings obviously don’t prevent cancer. But screenings will detect cancers early, when treatment is more likely to be successful.

7. Exercise: Evidence increasingly suggests that people who exercise have lower risk of certain cancers than those who are sedentary. From 45 to 60 minutes of moderate to vigorous activity a day, on most days of the week, is considered optimal to decrease the risk of breast and colorectal cancers.

8. Limit radiation exposure: Ultraviolet (UV) radiation, from the sun, sunlamps or commercial tanning beds, is the primary cause of skin cancer.

9. Stop smoking or don’t start smoking: The risk of cancers caused by smoking is proportional with the length of time a person has smoked and the quantity of cigarettes smoked. Lung cancer, the leading cause of cancer death among Americans is caused by smoking. Quitting smoking decreases the risk of lung cancer and it is never too late to take action on this.

10. Guard yourself from infection: Infections caused by viruses are well known to be risk factors for a wide variety of cancers. Human papillomavirus (HPV), which is a sexually transmitted disease, is the most frequent cause of cervical cancer. Chronic hepatitis B and hepatitis C aggravate the risk of liver cancer. They are usually spread by contact with contaminated blood, contaminated needles or sex. Human immunodeficiency virus (HIV), the virus that leads to AIDS, additionally increase the risk of many cancers.

Cancer prevention step 1: Don’t use tobacco

All types of tobacco put you on a collision course with cancer. Rejecting tobacco, or deciding to stop using it, is one of the most important health decisions you can make. It’s also an important part of cancer prevention.

Smoking has been linked to several types of cancer, including:

Bladder
Cervix
Esophagus
Kidne
Lip
Lung
Mouth
Pancreas
Throat
Voice box (larynx)

Chewing tobacco has been linked to multiple types of cancer, including:

Esophagus
Mouth
Throat

Inhaled chewing tobacco (snuff) may increase the risk of cancers, including:

Esophagus
Mouth

Even if you don’t smoke, avoid exposure to secondhand smoke. Being around others who are smoking may increase your risk of lung cancer.

Cancer prevention step 2: Eat a variety of healthy foods

Though making healthy selections at the grocery store and at mealtime can’t guarantee you won’t get cancer, it may help reduce your risk.

The American Cancer Society recommends that you:

Eat an abundance of foods from plant-based sources. Eat five or more servings of fruits and vegetables each day. In addition, eat other foods from plant sources, such as whole grains and beans, several times a day. Replacing high-calorie foods in your diet with fruits and vegetables may help you lose weight or maintain your weight. A diet high in fruits and vegetables has been linked to a reduced risk of cancers of the colon, esophagus, lung and stomach.

Limit fat. Eat lighter and leaner by choosing fewer high-fat foods, particularly those from animal sources. High-fat diets tend to be higher in calories and may increase the risk of overweight or obesity, which can, in turn, increase cancer risk.

Drink alcohol in moderation, if at all. Your risk of cancers, including mouth, throat, esophagus, kidney, liver and breast cancers, increases with the amount of alcohol you drink and the length of time you’ve been drinking regularly. Even a moderate amount of drinking — two drinks a day if you’re a man or one drink a day if you’re a woman, and one drink a day regardless of your sex if you’re over 65 — may increase your risk.

Help to Stop Smoking – Mayo Clinic
There are proven treatments that help people stop smoking. Medications and supportive discussion with a health care provider and counseling with a specialist will greatly increase your chances for stopping. In this video, health care providers from the Mayo Clinic describe medication and counseling options and explain how they work to help smokers stop smoking Patients tell how treatment provided for them the help they needed to become and stay smoke-free. There is effective treatment for anyone who smokes. Visit the Mayo Clinic website.