A lot of people who are on their 20s are doing things that they eventually regret once they hit their 30s. Younger years can be quite fun especially if you go out on weekends. However, it is important that you think about the future consequences of your actions. If you tend to smoke, party hard, and drink a lot of alcohol during your younger years, this may not be a good thing when you get to a certain age. For one, habits are hard to break. Can you imagine quitting your smoking and drinking habit when you are about to hit your 30s? This may not be an easy task to do.