From experience. Keep trying a lot of things, and keep introspecting and reflecting on things which have gone well, where interesting and felt less like work or

From experience. Keep trying a lot of things, and keep introspecting and reflecting on things which have gone well, where interesting and felt less like work or effort; but where rather fun and enjoyable. Over time, you'll get a taste of what is purposeful, and then you keep going that way, while continuing to introspect and reflect.