This probably won't work for everyone or all the time. 
It's not perfect for me either.
But I hope it makes a difference.

1. If you are like me and actually stop eating when in a depression episode, stock up on Ensure or something similar. It's easy to consume and will make sure that you get some nutrition. The weaker I get the harder it becomes to get out of an episode. You could even keep this at your bedside so that it's easy to access if you are having trouble getting out of bed.

2. If you have done nothing that day and not gotten out of bed, try to at least take care of one or more of the below. Only commit to one if you need to so it's not overwhelming. Even if you do 1 thing you'll feel better and it will be a step forward.

- brush your teeth (you'll feel fresh afterwards)
- wash your face
- comb your hair
- change your clothes
- shower
- some sort of groom yourself - shave, cut nails, paint nails...
- open the curtains (even for a little while)
- walk around your apartment or house
- 5-10min tidy up
- atleast one load of laundry if you need to do laundry
- 10 jumping jacks, push ups or sit ups

3. Place sticky notes with affirmations or reminders that motivate you around your room or apartment or house. For example, when I'm in the thick of depression I sometimes spiral in negative thoughts and forget realizations I've come to. It could be about letting go of the past or someone that hurt me. It can also be something like telling myself to go for a walk, because even if it's hardy now, the second I step outside I'll wonder why I don't go out more.

4. Taking vitamin D. It's helped me with my mental health.

Do you have any other ideas?