I work in the security industry, and for me, it was attending the DEF CON conference. I was feeling very demotivated and burned out at my current job, but going to the conference rekindled my drive and thirst for learning. Being surrounded by so many like minded who are incredibly passionate about their craft, and actually talking to and learning from these people opened my eyes to how many interesting things there are to learn. Of course, the presentations and workshops were very educational as well. I just bought like five books that I want to devour as soon as I get home, and start working on more projects in my spare time. In your situation, maybe going to a conference or even a local meetup group, or just in general surrounding yourself with passionate people, might reignite your sense of wonder. Good luck!