I'd encourage you to envision what you want your life (average day, average month) to look like in 10 years, and work backwards from there.
A long vacation might be the answer, but it's much easier to figure out what you need when you know what you want :)
If I have to answer within the realm of realistic, then my answer is - honestly I don't know.
I want to enjoy my life. When I'm working I want to feel excited and invested. When I'm not working I want to feel like my time is well spent.
The issue really is, I don't know what I need to do to feel this way. I have a great job, pays well, etc. Comfort is definitely not the issue. I travel occasionally, but that's not sufficient. Life just feels so monotonous and boring but doesn't seem to bother anyone else.