Juggling interests effectively

As I've mentioned before, I'm a project junkie. I'll find a new interest, dive into it fully for several weeks, then lose the taste and forget about it for ages. And my pre-existing, established interests sit in a wheel that circles round, waxing and waning in importance and interests. I picture this when I was teenager like a little roulette wheel. Where was my attention going to bounce to next? Writing a novel? Making an RPG maker game? Making an UTAUloid? Vlogging? Learning Icelandic?