Kylie, I have entered a few periods of deep depression myself, which lasted for months. For my first bad depression, I got tired of sleeping in my chair all day long and decided I would put vinyl siding on my house to have a reason to wake up every day. I only had enough energy to do about 3 hours or less work every day, but slowly I was able to complete the task. That helped me get out of the depression.
The other two times I used walking on a treadmill to help me. After spending months on a couch both times, I finally was tired of doing nothing and hopped on the treadmill. It was really hard at first. I would get winded within 10 minutes. Eventually, I made it up to 20 minutes with no trouble and kept increasing the time to 1 hour. Now I walk on the treadmill about an hour 4-5 days a week because that helps me fall back into a depression.
Working a part-time job also helped me out of my latest depression. It took months for me to feel OK, but now I am productive and can work on hobbies, have focus, and feel wonderful for the most part. I also tweaked my medicines and that made a huge difference.
In addition, I cut back on alcohol consumption. When I don’t have something to do, I figure why not have a beer. But I love high gravity beers at like 8-12%, so after drinking one the part of my brain that says “you will feel like crap tomorrow” turns off and I will have another one. The next day I might have extra caffeine which interupts my sleep and the cycle can start again. But then I reset and feel better and stay away from beer as much as possible. Limiting my espresso intake to one per day also helped me. I need to get restful sleep, so drinking more than one espresso or even drinking one beer disrupts the deep sleep I need to feel refreshed the next day.
For me, making tasks on my phone helps me not go into a depression. I make it a goal to have at least one item to do each day. At 9AM, a reminder pops up on my phone to tell me the task I need to do, such as grocery shop, call someone, work on a jewelry project, do a specific chore, etc. That gives me some structure, and it really helps.