The to-do list is a tool, age-old and one that is proven to work. With all of the options for a digital calendar (iCal, Google Calendar, Etc.) and digital lists (Evernote, Google, Notes) a handwritten to-do list may seem old hat.  While I use iCal and Evernote, I still find it necessary to write down my day’s agenda in a ready to grab & go format. Scientists have proven that pen to paper note taking helps us distill information & make it memorable.