Once you get that spark, keep it alive by adding some variation to your creative routine. One of the reasons we burn out is because we naturally love routine and tend to do the same things over and over and over (and over) again until we grow tired of them. Like listening to a song that’s an absolute banger until we start to hate its guts (Old Town Road, anyone?).
I highly suggest listening to some new genres of music that are different from your usual, maybe a little weird, maybe a little confusing. If you want any suggestions, let me know! I’d love to recommend some. You can also try writing your songs with a different process, starting on a different instrument, bringing in a co- writer/topliner, trying a completely different technique, etc. Variety is the key to maintaining a thriving creative fire and not burning out.
To summarize, add routine to your life to keep the sparks for creativity flying, and cultivate those sparks by feeding them with variety. Or… buy a houseplant and spend all your energy worrying about if you’re not watering it enough, or if you’re overwatering it.