Blackjack players often make mistakes by not following basic strategy, which leads to poor decisions based on instinct rather than logic. Chasing losses by increasing bets or playing emotionally can quickly deplete a bankroll. Failing to manage funds or set limits also contributes to losses. Many players miss opportunities like doubling down or splitting pairs correctly, while some take insurance bets, which are usually not favorable. Additionally, getting distracted or overly confident can cloud judgment, and not understanding the house edge can result in choosing unfavorable bets. Being aware of these pitfalls and playing with a clear, disciplined approach can significantly improve a player's chances of success.