▁all ▁the ▁tasks ▁the ▁person ▁needs ▁to ▁accomplish , ▁and ▁a ▁daily ▁to - do ▁list ▁which ▁is ▁created ▁each ▁day ▁by ▁transfer ring ▁tasks ▁from ▁the ▁general ▁to - do ▁list . ▁An ▁alternative ▁is ▁to ▁create ▁a ▁" not - to - do ▁list ", ▁to ▁avoid ▁unnecessary ▁tasks . ▁ ▁Task ▁lists ▁are ▁often ▁prior it ized : ▁ ▁A ▁daily ▁list ▁of ▁things ▁to ▁do , ▁number ed ▁in ▁the ▁order ▁of ▁their ▁importance , ▁and ▁done ▁in ▁that ▁order ▁one ▁at ▁a ▁time ▁until ▁daily ▁time ▁allows , ▁is ▁attributed ▁to ▁consult ant ▁I vy ▁Lee ▁( 1 8 7 7 – 1 9 3 4 ) ▁as ▁the ▁most ▁prof itable ▁advice ▁received ▁by ▁Charles ▁M . ▁Schw ab ▁( 1 8 6 2 – 1 9 3 9 ), ▁president ▁of ▁the ▁Beth le hem ▁Ste el ▁Corporation . ▁ ▁An ▁early ▁advoc ate ▁of ▁" ABC " ▁prior it ization ▁was ▁Alan ▁Lake in , ▁in ▁ 1 9 7 3 . ▁In ▁his ▁system ▁" A " ▁items ▁were ▁the ▁most ▁important ▁(" A - 1 " ▁the ▁most ▁important ▁within ▁that ▁group ), ▁" B " ▁next ▁most ▁important , ▁" C " ▁least ▁important . ▁ ▁A ▁particular ▁method ▁of ▁applying ▁the ▁ABC ▁method ▁assign s ▁" A " ▁to ▁tasks ▁to ▁be ▁done ▁within ▁a ▁day , ▁" B " ▁a ▁week , ▁and ▁" C " ▁a ▁month . ▁ ▁To ▁prior it ize ▁a ▁daily ▁task ▁list , ▁one