Never:
Never watch porn. It creates some more physio-psychological problems than you think. 1. aggressive behaviour, 2. Low self-esteem, 3. Loss of mental peace and tranquility, 4. In the long run lamentation of waste of time and better opportunities to satisfy life. 5. Failure in every front will lead to sleepless nights.
Never take any drugs. The long-term effects of drugs are very similar to the effects of watching porn regularly.
Never gamble with money. It damages creativity and scientific thinking.
Worship Brahma for Brahmacharya, and Vishnu for not gambling with a limited lifetime. Maheshwar for overcoming drug addiction. Hindus worshiped this trinity for a long time but the modern generation missed the importance of the trinity.