3. Eat Right
The most important and comparatively easier change you can make in your lifestyle is your diet. Just like how a car requires clean fuel to run efficiently, our body also requires the right fuel i.e., food to function properly. On the other hand, dirty fuel will cause long term complications in the same car. Similarly, unhealthy food will mess your body in the same way.
Junk foods, soda, processed food, etc. are the single biggest contributor of obesity in the world. Avoid them and make sure that you eat right. Eat fruits and vegetables on a regular basis.