Every day I make a list in a long running text file. I typically copy the previous day and modify it.

  \\ [date]
  need
  - things that absolutely have to be done today
  really should do
  - things that I really should do today
  should do
  - other things I should do to get ahead / stay on top of
  want to do
  - what I actually want to do today if possible
  concerns
  - things that I'm currently concerned about (to help me resolve them without losing focus)
  one thing
  - I'm going to do this one thing for 3-4 hours straight today