I have fibromyslgia but have contended with depression for over 30 years. Always fatigued before but with the fibro its worse. I do find that forcing just 15 min of the activity of showering or making coffee or whatever and sitting in the sun and or just weight lifting movement can really help. The trick is getting it stsrted. Dont plan on doing anything else except going back to bed. Set a timer for 25 or 20 min. Just move even get a little chore or two done even if there is 100 that need attention. Pick movement for 25 min even if its just a shower and you might be surprised how often you'll want to go past the 20 min timer and or how much more energy and lack of motivation disappears. Even if it doesn't it builds on its own but you have to commit to that 15 min to you, no one else just you. If you just go back to bed its OK, you completed that one and maybe tomorrow will be the day you get an extra surge but you will get it and it'll help you identify what really helps YOU!!