This approach also lets you move the big thing (or hard thing) to a time when you are at your best and have few interruptions. I personally like to do the hard

This approach also lets you move the big thing (or hard thing) to a time when you are at your best and have few interruptions. I personally like to do the hard or more unknown bits sooner, and sometimes I even save up the easy stuff for those after-lunch hours when my brain feels mushier.