However, after I got well enough to move, regular movement helped wonders (I also think it helps get you into an embodied consciousness that contains less interpretation and more direct experience/awareness - esp somatic practices of moving meditation, yoga, contact improvisation)
Also, once I started getting /serious/ about exercise - like actual cardio and weightlifting 5 days a week - my energy levels skyrocketed after about 2-3 months, but it did take a bit.
--
Slightly off topic, but I'm convinced we'll also eventually have a lot of robust data that shows that alcohol, even in minor but regular amounts (2-3 drinks most days of the week, say) has large negative effects on mood/energy that build up over time.
--
I don't have any problems with psychoactive drugs, SSRIs never helped me, nor tricyclics, (stimulants help mood/energy a lot but have significant negative effects)- but if someone wants to try them, by all means do!
However, if someone came to me struggling with depression, I'd nearly 100% of the time encourage them to start exercising regularly, cut alcohol/eat better, and see a talk therapist or work through a self-help workbook and see where they are at in 3 months whether or not they also wanted to take anti-depressants.