Feeling drained after a long day at work and struggling to find energy for personal projects is a common experience, yet the "40% Rule" from the US Navy SEALs suggests that when you feel exhausted, you still have 60% of your energy left. The author explores this idea by recommending a technique learned from writing coach Beth Barany, which involves committing to work on a project for just five minutes. This brief period can help overcome mental barriers and potentially spark motivation, leading to a more extended and productive session if the energy allows. The approach emphasizes recognizing personal limits and not feeling guilty for resting when truly fatigued, while also highlighting the potential for unexpected productivity once initial resistance is overcome.