I turn 42 this year. My feeling is that there’s always something you haven’t tried. Over the years, I’ve changed careers, failed to change careers, went back for a masters degree, tried totally unrelated hobbies, and more. I’ve done community radio, had writing published, played in bands on the radio, started blogs and apps, and more. If it’s getting stale, look for a change of context, maybe even move cities. But often you can just follow your interest into something new. Works for me at least