filofax
/ˈfɪloʊfæks/Definitions
1. noun
a type of notebook with pre-printed pages used for organizing and recording appointments, notes, and other information
“She uses her Filofax to keep track of her schedule and to-do lists.”
2. verb
to organize or keep track of something using a Filofax or similar system
“He filofaxes his entire life, from work to personal appointments.”