After big occasions like Ramadan or the first 10 days of Dhul-Hijjah we may struggle to keep our iman on a high. We may ask ourselves how can I increase my iman? 

In order to increase your iman you have to offer good deeds and you have to refrain from bad deeds. When you pray on time, when you are kind to your parents, when you connect with your next of kin, when you pray night prayers, when you fast voluntary fasts, when you give charity to the needy and the poor for the sake of Allah, you will find that your iman is increasing. 

The other thing that we must all do is to stay away from sin and Allah will increase our iman greatly. Allah rewards those who do what they are supposed to do.