#5 – Smoking
This is an obvious one, as there is no popular habit on our planet that is as harmful as smoking cigarettes. This habit is responsible for one in five deaths in the United States for example, and the statistics are not too much different in other countries. Smoking causes nearly 90 percent of all lung cancers, and increases the risk of developing throat, mouth and bladder cancer, strokes, and high blood pressure among other diseases.
If you opt to quit smoking, you’ll have almost instant health benefits, since your lungs and cardiovascular system will begin the process of self-repairing. A month after you’ve quit smoking, you should have more energy, have less shortness of breath and be coughing less. Not only will the risk of different diseases start dropping, but your breath will be much fresher as well, and you won’t have that unpleasant tobacco smell on your clothes.