In that case, I’m strongly recommending https://www.goodreads.com/book/show/1633.Getting_Things_Done for you. :) Speaking about productivity, this may be the most important book that I read (and I like productivity books). It’s not mindblowing, but I’ve been using GTD with https://culturedcode.com/things/ for many years, all thanks to reading David Allen’s book 15 years ago.