What should I do to mend my ways and repent from smoking and shortcomings, even though I observe the obligatory prayers and strive in remembrance and supplication before sleep?

The questioner is congratulated on being guided to remembrance of Allah. He is advised to adhere to congregational prayer at all times if he hears the call to prayer, and this is particularly emphasized for Fajr prayer. For whoever prays it in congregation, it is as if he prayed the whole night. The obligation of praying in the mosque is indicated by the hadith (definition): "Whoever hears the call [to prayer] and does not come, there is no prayer for him except for one with an excuse." He should sleep early and use an alarm to wake up for Fajr prayer with the congregation. He should also strive against his own desires, avoid sins, and be mindful of Allah's constant observation. He should read books of encouragement and deterrence, associate with good people, and stay away from bad companions. He should remember the harms of smoking and frequently ask Allah for guidance, success, and help in obedience.