There are many things that are better to avoid than engage with; even more are those that are of doubtful usefulness. In life, it is more important what you say “no” to than what you say “yes” to, and in a diverse society, saying “no” more often than “yes” is a symptom of healthy non-naïve living. Some things are dangerous without exceptions and without any doubt. They should not be feared, but observed, recognized as they are, and prudently avoided:

Smoking
Alcohol
Drugs
Steroids
Pornography
Gambling
Running from mental discomfort to distractions
Addiction to sensory pleasure
Addiction to validation
Unmindfulness of own habits
Expectation of permanence
Addiction to a relationship
Disrespectful listening
Giving easily and breaking promises
Acting particularly unmindfully in regard to conflict
Emotionally manipulating, weakening, or punishing
Generating untruth and hypocrisy
Early age sex (before early adulthood), uncommitted relationship sex (especially if combined with early age), adultery
Limerence
Non-calming music, movies, programs, computer games, other videos (depressive, exciting, agitating, indoctrinating, numbing, addicting)
Click-baiting and scroll-baiting social networks, apps, websites
Shallow sources of information
Informational bubbles
Disbalanced consumption of information
Commercials
Impulsive shopping, over-spending
The delay in setting the social boundaries
Crowd emotional and intellectual influence: praise, blame, motivation, demotivation, delusion
Involving into family matters unsupportive relatives or friends
Fast foods, snacks, and sugar drinks, except rare cases
Food supplements and unnecessary medicaments, except rare cases, when really needed
Spiritual gurus, preachers, and seeker groups
Signing contracts without thoroughly reading them
Fanatically siding with factions or tribes: gangs, religions, nationalities, races, parties, philosophies, social classes, other social groups
Excessive partying, clubbing, bars
Health- or growth-damaging sports
Displaying your private life or possessions publicly
Talking about oneself, sharing one’s story or opinion where there is no absolute necessity – and there is almost never such a necessity
Getting quickly into friendships and partnerships with people
Clinging to possessions, people, ideas, ambitions, pleasures, comfort, permanence, etc.
Caring about and trying to maintain reputation instead of integrity
Betrayal of family
Preaching or giving unsolicited advices
Forgetting the inevitability of death
Judging, fighting, punishing people for breaking these principles
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MEDITATION