Do you ever get to the stage in life where basically nothing impresses you anymore?

Where everything just seems boring and grey? Like you need more of a challenge?

Where you brain is just dull and mush? Like you've lost motivation and everything is just boring?

I've tried a lot of things, but what's the best way to get out that slump? To keep on grindin'? (Not that kind, you dirty dog!) I need some advice.