The Sales Director Who Kept Losing Sharpness Right When It Mattered Most

Rachel ran a sales team of 22. She was good at her job. But the afternoon slot — the one she needed for strategic thinking and difficult conversations — had become unreliable. The fix was embarrassingly simple.

Rachel is 41, a sales director at a SaaS company. Her mornings are structured and productive. Her team meetings run from 11am to 1pm. By 1:30pm, she is typically in the territory she describes as "the decision hole" — a two-hour window where her thinking slows, her confidence in her own judgement wavers, and she finds herself deferring decisions she would have made quickly that morning.

This mattered. The afternoon slot is when her most important strategic conversations happened: negotiations, difficult personnel conversations, board prep. Having those conversations at 70% was a professional problem.

She had tried eating a more substantial lunch. She had tried a 20-minute walk at 1pm. She had tried caffeine, and then reduced caffeine after noticing the crash made it worse. None of these made a meaningful difference.

She had not tracked her water intake, because she considered herself "a fairly healthy person who would notice if she was dehydrated." She drank coffee in the morning — three cups by noon — and had water at her desk that she described as "around half a litre throughout the day."

When she calculated her actual intake it came to approximately 900ml on a typical day, against a perpHect target of 2,000ml. She was drinking less than half of her actual requirement, largely displaced by three coffees with mild diuretic effects, and she had been doing this consistently for years.

The change she implemented was characteristically systematic: a 500ml bottle at her desk filled at 8am, finished before her 11am meetings. Another filled immediately after. A third with lunch.

The decision hole narrowed significantly within the first ten days. She described the overall change as "the most cost-effective performance improvement I've made in years — and I've spent a lot of money on other things."