"Next actions" are the cornerstone of Getting Things Done. In the same way that you can't have a great band with a shitty drummer, you'll never master GTD until you get yout next actions straightened out.

I’ve noticed that there are often items on my “next actions” list that hang around a lot longer than they should. I scan and rescan and sort and add and delete, but there’s always a few stragglers who hang out there for a week or more. Eventually this starts to vex me, and I try to debug why things aren’t getting done.

For myself, I’ve discovered that most of the items are just in the wrong place, or, if you prefer, in the wrong time or context. It can be instructive to pull each straggler out of line and try to figure out whether he really belongs someplace else. Here’s my usual suspects, ordered by how often each is the culprit behind my unintentional slack.