As a person who easily falls for "preparing" over doing the work, I committed to the hipster PDA [1] as an antidote to this for many years: "the Hipster PDA comprises a sheaf of index cards held together with a binder clip."
My pocket index cards haven't run out of VC money or instituted a new subscription model yet!
Fellow index card productivity hacker here, do have a plan to start numbering and indexing them in a databasing drawer system. Thankfully, have not had time to implement this one just yet.