If you are a Christian, it affects your day to day life by becoming what your main focus in life is. In every action you do, you should seek to glorify God. You should make your deciscions based upon the Bible, fellowship, and the guidance of the Holy Spirit. You should work to keep your life pure, not only from sexual immorality, but in every faccet in life.
Your everyday life from what music you listen to, what shows on tv you watch, all the way to how you interact with your friends or enemies; all should be changed because of the "renewing of your mind" (Romans 12:2). When you come to believe, your entire life should be different than what it was before you believed; you will no longer worry about the the things of this world, but have your hope in things above. No, life won't be perfect, and it won't be without persecution, but it will be more joyful