managing life on the whole is complex, cognitively and emotionally costly, and alienating at times. (it is good at times, too. I am just noticing the negatives.....)
The problem is that getting one's whole life into a rubric and so on is unnatural, and is not necessarily positive.
But there are localized tricks. When you say that sleeping well is very good for the good life, you are not entangled in the whole math of life. It will surely have to be done with care and in the right context. But the change (i.e. sleeping more) is not inherently dependent on the right calculation about one's whole life.
It is probably good in that context to find the tricks that are very efficient. things where the value of change is high relative to the status quo. I believe in the idea of doing extremely profitable things.