Self-control in all areas of lifestyle is also key to better health and wellness. For instance, the most successful athletes show significant self-control in diet and exercise to obtain significant performance advantages. Many elite athletes abstain from all alcohol and drugs to achieve their high levels of performance—including Cristiano Ronaldo and Venus Williams. Self-control might often mean more than simple moderation. In some case, there is a need to completely abstain from something that can harm our health. Smoking is one primary example. Is it okay to smoke just two cigarettes per day? No! Research has shown that the only guaranteed health benefit is complete abstinence from cigarettes.