Precepts
It's also important to observe precepts, or basic moral guidelines. In Buddhism, we consider that a reasonable human being will not kill, not steal, not commit adultery and not lie to others. Additionally humans should not drink alcohol which disturbs mindfulness and makes one liable to break the above precepts.
People who take precepts will have better meditation because the level of mindfulness is high enough to maintain the mind within our body without distress.
Anytime an individual breaks a precept, a dark element will arise in their mind. This element is the opposite of the bright element which arises when we meditate.
Always try to remember: Observing precepts allows your meditation and self-development to progress better.