I have the same problem. But the more I tackle it in reasonable ways, the better it gets. Here's some pointers that work for me:

- enough sleep, rather get in bed early than late as the quality of the sleep depends on natural rhythms

- engage with people that are affected by my work - this is important for motivation and to keep track of what actually matters

- operationalize everything, say out loud what to do next

- being honest when I have bad focus, talk about it

- trust my instinct and do the right thing, if I don't I quickly lose focus and motivation, if opinions don't align learn why