To handle a losing streak in blackjack, avoid chasing losses by increasing your bets. Stick to your betting strategy and review your play for any mistakes, but don't overanalyze individual hands. Take breaks to clear your mind, and always keep your bankroll management in check by setting loss limits and knowing when to walk away. Remember, losing streaks are a natural part of the game, so stay patient, stay disciplined, and trust in the long-term strategy.