I often try to execute what seems to be a short simple next action. Then, I find out it has an unexpected prerequisite, which in turn has an unexpected prerequisite, etc, and soon, that short next action has consumed a few days of time. I guess you could say it has turned out to be a project. My question -- do you use the original next action as a placeholder, and just keep plugging at all the other things that come up, perhaps identifying a new bookmark at the end of the day to mark your place on the still-incomplete next action? Do you stop and make it a project? Does it matter? Currently, I am trying to eliminate that 'bogged-down not-making-progress the-original-bookmark-is-irrelevant' feeling.