Managing a poker bankroll effectively involves maintaining strict discipline and setting clear limits to avoid emotional decisions. Allocate a specific amount of money solely for poker, separate from personal finances, and choose stakes that align with your bankroll size to minimize risk. A conservative approach, like having 20-30 buy-ins for cash games or 50-100 for tournaments, can help you withstand variance. Track your wins and losses to evaluate performance and adjust stakes if necessary. Avoid chasing losses by sticking to predetermined limits, and gradually move up in stakes only when your bankroll comfortably supports it, ensuring long-term stability.