Always sleep with a clean heart. I know many of us get wronged throughout the day or have gotten wronged in the past. Forgive. Not only forgive, but forgive and forget. Dont even hold a grudge against that person in your heart. Keep your heart completely pure. Allah Taala has promised to reward you because you are forgiving for His sake. He understands you. When you strive to follow the right path , some people might show that they just dont like you. They might try to insult or criticise you, whether to your face or even behind your back. Again, forgive. This can sometimes be one of the most difficult challenges to do, but again you are forgiving for the sake of Allah Taala and He will reward you tremendously. No one went through more abuse, insult and criticism than our Prophet Muhammad (saw). They even killed some of his family members, tortured and killed many of his followers, but he still taught us to forgive. Forgive brothers and sisters, this is one of the practices of the greatest people ever to live and this is how we will reach those highest levels of Jannah (Heaven). Almighty Allah even says, "Those will enter Jannah who come to him with a pure heart."