We are now in the peak season of tshuvah. We are trying to repair all our aveiros. The Rambam lists 24 things that prevent a person from doing tshuvah. If you are serious about your tshuva it is imperative that you review the list. You can find a summary of it by clicking here for Revach Lists. The Rambam in Hilchos Tshuva Perek 4.