Maybe going through some old notes or listening to music that inspired you may help :3
I support @Verdelite 's statement and I suggest to read stuff that fits your theme. Like... I like to read mythology to find new lore for my world. Or I like to look for the meanings of the names of my characters to know if they match their personality. Little by little, stuff that doesn't seem like much will give you the strength you need ^^
I usually try to go out for a walk, listen to music, or play a game. All it takes is one small thing to inspire and motivate you.
That's how i dropped several projects : )
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