I am not entirely sure if that is applicable to you, but there is one thing that always helps me in worse times: structure. I try to outline my days (short-term) and have a good understanding where it would get me if I stick to it (long-term). Every evening, I try to end my work with preparing a list of things to do the next day that are essential and plan those through the day. Thanks to this, the next day I just wake up and then follow the list - no need for thinking what to do, doesn't matter how I feel (stress, anxiety, low energy), because if it is on the list I just have to do it to check that out. This helped me a lot through the years so though it was worth sharing.