What is the specific way of life that leads to Paradise for a married man (46 years old) with three children?

The answer is summarized in the Prophet's hadith to Mu'adh, in which he clarified the fundamentals of righteous deeds: its pillar is prayer, its peak is jihad, and the mastery of all that is restraining the tongue. It is obligatory to obey Allah's commands and avoid His prohibitions by observing the obligatory duties, for they are the best means of drawing near to Allah, along with adhering to piety in all aspects of life. For success in this, it is recommended to maintain good deeds, congregational prayers, remembrances (adhkar), reading books of encouragement and deterrence, studying the biographies of the pious predecessors, associating with the righteous, remembering death, feeling Allah's constant watchfulness, lowering the gaze, turning away from idle talk, and having good manners. One must be keen on seeking Islamic knowledge and attending scholarly gatherings, and establishing an educational program that begins with memorizing the Quran and then the hadiths. With children, it is important to encourage them to memorize the Quran and hadiths, narrate stories of the pious predecessors, encourage them to learn, strive to marry them off early if they reach maturity, and encourage them to observe voluntary fasting.