if I check e-mail once per week and that results in an average loss of two sales per week, totaling $80 in lost profit, I will continue checking once per week because $200 (10 hours of time) minus $80 is still a $120 net gain, not to mention the enormous benefits of completing other main tasks in those 10 hours. If you calculate the financial and emotional benefit of completing just one main task (such as landing a major client or completing a life-changing trip), the value of batching is much more than the per-hour savings.