Forming good habits is key. There is a light at the end of the tunnel for smokers wanting to quit.
A large study published in The Oxford Journals reported that if a person abstained from smoking for 3 years, they had a 90% chance of not smoking again.
To re-iterate, over 90% of people who abstained from smoking for 3 years did not return to smoking.
Watch this clip to see one man who changed his habits and succeeded in going from obesity to completing a marathon.