I never tried it but I've heard that Transcranial Magnetic Stimulation (TMS) helps some people for whom antidepressant medication isn't effective. I never heard of TMS when I was clinically depressed but I learned about it recently as there was a new TMS facility next to the psychiatrist rooms that I attended recently, about 45 minutes away from where I live. I'm longer depressed (thank God) and was visiting my psychiatrist for a check up.
When I was depressed, the only thing that provided me with instant, albeit temporary, relief was the opportunity to speak with and listen to someone else, in person, on a topic of interest. I also started volunteering at Lifeline (who provide excellent training), and I found that being on the phones was therapeutic. At the end of a shift, I also gained the impression of "there but for the grace of God, go I" compared to the travails of some of the callers.
I also got some temporary relief from my depression symptoms by listening to a Jon Kabat-Zinn mindfulness app, on my phone.
I didn't know it at the time, and I don't know how I'd go now, since I can now recognise the symptoms of pre-depression and ward them off. That said, it is possible to do things in spite of the black dog. The dog is always there, sapping your motivation, in my experience.
When I was volunteering at Lifeline, I saw this picture:

The first two steps resonated with me from when I was depressed. What kept me going was hope and my love for family, and the small things like seeking treatment (psychological and medical), mindfulness, and volunteering. I didn't do so at the time but I'd now suggest finding a depression self-help group. Misery loves company, and you get to hear from other folks as to what's worked for them. and it gives you an excuse to get dressed.