motivation
General mountain dulcimer or music discussions
JP, I feel semi-professionally obliged to suggest that if you are indeed facing a more general feeling of malaise than merely not being inspired musically, you might want to seek expert help. Online friends in music can only do so much.
If it is musical inspiration you seek, then perhaps we can help you.
I find that although my interest in music is pretty constant, my excitement about working on my own musicianship ebbs and flows. Sometimes I just don't have a song or technique that I want to learn or work on. I pick up my instrument and just don't know what to play. One thing I do then--which doesn't even address the problem--is to continue playing scales and arpeggios and other exercises. In fact, I probably do more work merely on technique during the periods when I'm not inspired because I don't know what else to play and because when I am inspired, I want to play something specific. But working on that technique means that when I do find that inspiration, I am better able to play it at a level that pleases me.
I also keep a list of "to learn" songs. When I am busy working on other stuff but discover a tune I'd like to play, I add it to a list. Then during those periods when I'm just not feeling the inspiration, I peruse that list and sometimes a tune pops out and I rediscover what I liked about it. If nothing pops out I sometimes force myself to start working on one of those tunes, and often once I start to "get" the tune, I also "get" what I liked about it and find my enthusiasm again.
I also keep a little file on my phone of musical ideas. If a melody hits me as I'm leaving the grocery store, I'll record myself singing or whistling it. A lot of that stuff never amounts to anything, but sometimes when nothing else excites me I'll listen to some of those files and find a melodic idea that I'd like to turn into a song. It's like a repository of half-ideas that can be flushed out later on. And when one of those half-ideas starts to become something fuller, it can be truly inspiring.
I also seek music externally. One way to do so is to listen once again to some of the music that first inspired you. For me, that means listening to the flatpicking guitarists who first demonstrated to me how elegant and exciting acoustic music could be: Norman Blake and Tony Rice. But I also look for new music that I don't know yet. Recently I've discovered the Canadian singer/banjo player Kaia Kater and the Memphis singer Valerie June. Maybe those musicians don't speak to you. But others will. Find them and let them reignite your inspiration.