Passion, direction, inspiration : How do you rediscover it?

As far as creative mediums go, something that helps me a lot is taking a break from your own stuff and trying to emulate a musician/artist/etc style that you wouldn't normally try to write. For example, if you're usually into writing heavy metal music, try emulating a psychedelic rock band or maybe something outside of rock music all together, if you're feeling adventurous. I find it helps me get out of my own head as far as the sound I want as well as giving you some unique ideas to implement in that sound you've been pining for.

I think this might be especially useful since you mention that you don't feel particularly passionate for the stuff you're currently working towards, and that you haven't gotten much done. I think, as far as your creative side goes, you might just be looking in the wrong direction. Trying a new sound might be exactly what you need.

It might also be the case that you won't ever care enough about any of the things you listed to really get anything done, which is fine also. There are lots of hobbyist stuff that you could delve into and since you've only named a few, maybe you just haven't found the thing that excites you enough to get it done? Have you tried programming? Building stuff (electronics / woodworking)? Making random shit (soap / specialty foods / quilting / anything in the world really)?

Late again, but a number of years ago, I attended a "happiness" workshop (don't ask), at a time when I had a variety of more-or-less creative endeavors making good headway - jewelry-making, cooking, science journalism, fiction writing, mail admin for a political campaign, woodworking, and some other things. [Yeah, it was a pretty privileged life, during the "fat" years of the pre-2001 tech bubble...]

I wound up workshopping (?!) with a kindergarten teacher who was feeling stuck, and like she wasn't capable of inspiring her students or being creative herself.

"How do you do it?", she asked.
"Just play", was my answer.

Let go of all the received wisdom and judgments about artistic taste, quality, worthiness, and everything else so you can just produce novelty. Entertain yourself, without any worry about what others might think, exactly as if you were five years old and making mudpies for your own delight.

And speaking as a never-reformed control freak, it's therapeutic not to obsess over whether the results reflect improvement, show progress, are fit for marketing, or any other goal-oriented purpose.

There's nothing simple about this, since we're usually stuck in judgment mode to master basic survival, conserving every scrap of energy for the dull labor that earns money. Making judgments about your own output is heavy labor in itself, and why working to set down that burden is the best way to re-engage with joy.

You can give yourself an opening to view the liberating fireworks that arise from screwing around to see what happens, when you try new things without preconceptions.