More than a few folks hold that bipolar has a lot to do with circadian rythms getting wonked up. You can consciously choose to fight several of them to lock them back into pattern. sleep schedules, eating times, scheduled afternoon walk, etc. Try to get the full 8 hours of sleep especially. Look into sleep hygiene.

That said... it eventually overwhelms many. I lasted a while with a very low stress, reclusive lifestyle, but now... I'm road kill without a stabilizer. And I'm ok with that.