I have so much to do that I am often overwhelmed. I will go to my grave with so much undone that I will certainly become histories most restless soul.
I am still using the Covey system of time management (see: “First Things First” by Stephen R Covey) but I am complimenting it with note cards. Each task is written on a note card so that I can only see (and think about) one task at a time. Each task gets a minimum of one very focused hour and then has the option of returning to the bottom of the stack. The tasks do not have to be done in order. Upon completion, the card may be burned.