This is a summary of 4 major choices that you can make to help stay healthy. The main benefit of these lifestyle choices is that in the future you are less likely to develop heart disease, stroke, diabetes, liver problems, lung problems, and certain cancers.

You should not smoke

If you smoke, stopping smoking is often the single most effective thing that you can do to reduce your risk of future illness. The risk to health falls rapidly as soon as you stop smoking (but takes a few years before the increased risk reduces completely). If you find it hard to stop smoking, then see your practice nurse for help. Medication may be advised to help you to stop.
Do some regular physical activity

Physical activity that gets you mildly out of breath and a little sweaty is fine - for example, jogging, heavy gardening, swimming, cycling, etc. A brisk walk each day is what many people do - and that is fine. However, it is thought that the more vigorous the activity, the better. To gain most benefit, you should do at least 30 minutes of physical activity on most days. Two shorter bursts are thought to be just as good - for example, two 15-minute bouts of activity at different times in a day.
Eat a healthy diet

Briefly, a healthy diet means:

AT LEAST five portions, or ideally 7-9 portions, of a variety of fruit and vegetables per day.
A THIRD OF MOST MEALS should be starch-based foods (such as cereals, wholegrain bread, potatoes, rice, pasta), plus fruit and vegetables.
NOT MUCH fatty food, such as fatty meats, cheeses, full-cream milk, fried food, butter, etc. Use low-fat, monounsaturated or polyunsaturated spreads.
INCLUDE 2-3 portions of fish per week, at least one of which should be 'oily' (such as herring, mackerel, sardines, kippers, pilchards, salmon, or fresh tuna).
If you eat meat it is best to eat lean meat, or poultry such as chicken.
If you do fry, choose a vegetable oil such as sunflower, rapeseed or olive.
Try not to add salt to food, and limit foods which are salty.

Try to lose weight if you are overweight or obese

You don't need to get to a perfect weight. If you are overweight you can gain great health benefits by losing 5-10% of your weight. This is often about 5-10 kg. (10 kg is about one and a half stone.)