I think it is a character flaw.

To manage this flaw I need to prioritize my to-do list, set aside adequate time to perform a particular task, and not get side-tracked from the task at hand.

My progress is that I now have a prioritized to-do list that is revised every two weeks or so. I still need to expand the list to include a section for work and home, and to keep a record of completed tasks to reinforce accomplishments.