Do habits really affect health?
Yes, very much so. All of the major causes of death (such as cancer, heart disease, stroke, lung disease and injury) can be prevented in part by making healthy lifestyle choices.
Don't smoke or use tobacco.
Smoking and using tobacco are very dangerous habits. More preventable illnesses (such as emphysema, mouth, throat and lung cancer, and heart disease) are caused by tobacco use than by anything else. The sooner you quit, the better.

Limit how much alcohol you drink.
Too much alcohol can damage the liver and contribute to some cancers, such as throat and liver cancer. Alcohol also contributes to deaths from car wrecks, murders and suicides.
Eat healthy.
A healthy diet has many health benefits. Heart disease, certain cancers, stroke, diabetes and damage to your arteries can be linked to what you eat. By making healthier food choices, you can also lower your cholesterol and lose weight.
Lose weight if you're overweight.
Carrying too much weight increases your risk for high blood pressure, high cholesterol, diabetes, heart disease, stroke, certain cancers, gallbladder disease and arthritis in the weight-bearing joints (such as the spine, hips or knees). A high-fiber, low-fat diet and regular exercise can help you lose weight and keep it off.
Exercise.
Exercise can help prevent heart disease, high blood pressure, diabetes, osteoporosis and depression. It can also help prevent colon cancer, stroke and back injury. You'll feel better and keep your weight under control if you exercise regularly. Try to exercise for 30 to 60 minutes, 4 to 6 times a week, but remember that any amount of exercise is better than none.
Don't sunbathe or use tanning booths.
It's best to limit sun exposure and wear protective clothing and hats when you are outside. Sunscreen is also very important. It protects your skin and will help prevent skin cancer. Make sure you use sunscreen year round on exposed skin (such as your face and hands). Choose a broad-spectrum sunscreen with at least an SPF 15 and one that blocks both UVA and UVB light.
Practice safe sex.
The safest sex is between 2 people who are only having sex with each other and who don't have a sexually transmitted infection (STI) or share needles to inject drugs.
Use latex condoms and a spermicide (a product that kills sperm) gel or cream.
Make time for breast health.
Breast cancer is one of the most common causes of death for women.Women should have a mammogram every 2 years to screen for breast cancer. Women who have risk factors for breast cancer, such as a family history of breast cancer, may need to have mammograms more often or start having them sooner.
Ask your doctor about other cancer screenings.
Adults should ask their doctor about being checked for colorectal cancer.Depending on your risk factors and family medical history, your doctor may want to check for other types of cancer.
Should I have a yearly physical?
Health screenings are replacing the yearly physical. Instead of every person getting the same exams and tests, only the appropriate ones are given. Talk to your family doctor about your risk factors and what tests and exams are right for you.