preventive measures

Please help me correct the following paragraph. Thanks!

According to the previous paragraphs, we can assume that most people actually have insomnia. There are many reasons which may cause insomnia, such as the pressure of work, studies or sickness. However, one of the most major factors is living habits. We found that most people who suffer from insomnia almost have an unhealthy lifestyle. They always stay up late or all night and don’t get enough amount of sleep. As a result, they need to get more time to make up their sleep at daytime. Therefore, their biological clock has been reversed. Under the vicious spiral, they feel extremely tired and exhausted, and they are gradually tortured by insomnia which makes people drained and lose concentration. We can adopt a healthy lifestyle:exercise regularly, eat healthy food, and think positively. Taking preventive measures to prevent insomnia is much better than taking pills.