Maybe it's weird, but I find some quotes about boredom itself are the best kick in the pants. Not the classic motivational ones about chasing dreams, but stuff that digs into the feeling of stagnation. Like the line from Susan Sontag's diary: "Boredom is just the reverse side of fascination: one only gets bored when one can’t find a context of promptings." That stings in a good way. It reframes the whole slump as a failure of my own attention, not the world's lack of interest.
When I'm scrolling mindlessly, that quote pops up and shames me into putting the phone down. It suggests the problem isn't a lack of stimulation, but my passive waiting for it. Another one, often attributed to various thinkers, is "Boredom is the dream bird that hatches the egg of experience." It sounds poetic, but it's basically saying the discomfort of boredom is an incubator. Sitting with that itchy, restless feeling can become the pressure that finally cracks the shell and makes you do something, anything, just to escape it. The quotes work because they don't just cheerlead; they diagnose the inertia and make sitting with it more painful than taking a small, concrete step.