If I have one piece of advice to give you all about what to search for in your quest for What Next, it's to find where the line blurs between hard work and happiness for you. To find that thing where working hard at it makes you happy, and where you're happy to work hard at it.
I've never had a moment when I thought: "Tom, you've made it!", and I don't think I want to, because that feels like you've reached the end; that you've crossed the finish line. But to me there is no end. An achievement is not a finish line; it's a checkpoint on a far greater journey. It's a moment to pause, to take a breath and look back and enjoy what you've experienced and be grateful for it, but then to turn around and look towards the next checkpoint, the next achievement.
Create. Not for the money. Not for the fame. Not for the recognition. But for the pure joy of creating something and sharing it.
Remember that there is only one important time and that is now. The present moment is the only time over which we have dominion. The most important person is always the person you are with, who is right before you, for who knows if you will have dealings with any other person in the future? The most important pursuit is making the person standing at your side happy, for that alone is the pursuit of life.