I'm currently thinking about this as well.

For one, I'm trying to get around being tired, so I have started making a list of all activities that might restore my mental energy and began doing trial runs with a scoring afterwards. So for example, I check how awake I currently am (8/10) and then watch TV for 20 minutes and check again (still 8/10). That way, I do 10-20 minute chunks and eventually get a useful list of working techniques.

Another is trial runs. I went through all my reasonably plausible self-help stuff and collected all techniques in a big list ("write down steps while you work", "timeboxing", ...). Then I pick a simple akratic activity and do a short run (at most a few days, often just one <1 hour go) and write down my experience.

I would really love to have something like a skill tree for some of my major goals, like Khan academy's knowledge map. I've tried making some myself, but I didn't really know in advance what kinda stuff should go in there and my attempts all looked like linear chains. Having clear-cut progression standards and a full map from dirt-easy to mastery seems to be a major component for my recent great success at picking up resistance training, but I haven't yet figured out how to transfer it to other skills.