Sustained attention through long meetings and workdays is a specific professional need worth reading against this site's own focus and mental-energy fronts together.
This site's focus front addresses mental alertness directly, while its mental-energy front addresses reducing fatigue and supporting sustained energy — worth reading both as relevant to a long-workday use case, rather than either alone.
David M.'s featured quote specifically describes steadier mental energy through long workdays — worth reading that individual account as one data point relevant to this specific use case, alongside this site's own general framing.