Productivity for me is more about managing my energy and motivation than time.

Hence I find a lot of planning and prioritization actually counter-productive. Some level is important, but not that much. I generally know what I need to do. More planning really doesn't clarify that.

Instead I work on energy. A lot of the things Sam mentions -- but for goals/priorities I tend to take a very long view (decades out) and a very short view (sometimes minutes out). So something inspirational I can get behind. Combined with something I can do right now.

Generally I find that creates the momentum.. and everything works out from there.