How can one increase piety and get rid of wasting time watching television and playing games?

Piety (Taqwa) is the compliance with Allah's commands and the avoidance of His prohibitions. It is the key to success and salvation in this world and the hereafter.

To cultivate piety, one must: 1. Strive in obedience to Allah: For Allah rewards obedience with increased guidance and piety. 2. Be diligent in fasting and do it often: As Allah Almighty says: ﴿SO THAT YOU MAY BE PIOUS﴾ (Quran 2:183), and as the Prophet, peace and blessings be upon him, said: "You must fast, for there is nothing equal to it." 3. Adopt the morals of the pious: Such as believing in Allah and the Last Day, giving away wealth, establishing prayer, paying zakat, fulfilling covenants, patience, spending [in charity], suppressing anger, forgiving people, and seeking forgiveness for sins. 4. Adhere to the guidance of the Prophet, peace and blessings be upon him, and stay away from innovations (bid'ah). 5. Distance oneself from Allah's prohibitions. 6. Ponder Allah's legislative and cosmic signs. 7. Engage frequently in the remembrance of Allah and the recitation of the Quran. 8. Keep company with good people and read the biographies of the pious.

One must prepare for meeting Allah, for age, youth, health, and time are blessings about which one will be questioned. Preparation for this is through righteous deeds. Every hardship endured in obedience to Allah in this world will be comfort in the hereafter, and every comfort enjoyed in disobedience to Allah will be followed by regret.