What are the means that help one achieve steadfastness and commitment, and break free from procrastination and lack of seriousness?

A person does not feel true happiness except by turning to their Lord, obeying Him, and striving against the self, as Allah Almighty said: "Whoever does righteousness, whether male or female, while he is a believer - We will surely cause him to live a good life." Procrastination in obedience and repentance is harmful; it is one of Iblis's soldiers, and its outcome is loss and regret. What helps in repenting and returning to Allah is realizing the closeness of one's end, and that initiating repentance now is easier, and being aware of Allah's observation and knowledge, and that true pleasure and a good life can only be attained through obedience to Allah, and constantly contemplating Paradise and Hell.