I feel like things will never get better.
Six years ago I went on Lithium because my depression was really bad and not improving. I am currently in the process of weaning off of that Lithium and now that I am at a dose that I am sure is not keeping depression at bay (300 mg daily) and have been at a subtherapeutic dose for several months, I feel I have learned a lot about my own depression.
First of all, as counter to everything in my mind and body as it was in the beginning, I MUST exercise regularly. I do not mean take a slow and dumpy stroll around the block a couple of times a month - like I tried in the beginning and then swore that exercise was not my problem. Cardio is my anti-drug. I bike or dance, typically at least 30 minutes a day, 3 days a week but usually more. This is the
most important thing in combatting my depression.
Secondly, I have to set goals. I must be working on something and making obvious progress or else I get down in the dumps.
Third, I have chronic pain that increases my depression and keeping that pain down keeps my depression from getting out of hand. Often this means PT exercises, heating pads, baths, etc.
Fourth, healthy food is important. I try to follow Dr. Daniel Amen's dietary guidelines but I fail pretty regularly as they are very strict. Still, the basis is there and it helps.
Best of luck to you.