Why does this happen?

(sigh ) Why does this happen so frequently?  I again lost track of what direction I should be going.  I didn't store all of my information in Win-Organizer as I should have.  However, I had notes in the program so I should have   I stopped to rename fields so that I could keep track of everything and then did not go back to where I was.  I did not make notes for that.  Looking at the note I had, I wasted a day looking in a direction that I should have gone.  I could have been done much sooner.