If you had to guess what (in)famous bartending legend and author Jeffrey Morgenthaler would say was his indispensable bar tool, what would say it is? According to Cocktail Kingdom, it's his notebook! Your bar staff should be encouraged to document their recipes (both trial and finished product) and other notes. Encourage their creativity and show them you care: grab one for each of your bartenders.
This Morgenthaler signature series Bartender's Blotter by Cocktail Kingdom provides 150 pages for you bar staff and includes charts for measurement conversions, pour costs, and more developed by the man himself.