Just make you hobbies terribly expensive so you can't do them or else you'll starve and die and then you still can't do them
I quit agonizing over my interests.
I've even tried to get my daughter interested in my interests so we could do them together and the interests would last longer.
didn't work
I'm bad about musical instruments and crafts like; glass blowing, knitting, blacksmithing, woodworking, jewelry smithing, electronics, metal working (machine shop type stuff), and the like.
Usually I get through one project and finish it, then I never go back to the stuff again.
don't know what to tell you since I can't control myself either. Perhaps hire someone to break your arm whenever you talk about a new hobby? Seems drastic, but then, you would be in a cast for at least 6 weeks until you could take it off and start a new hobby.
Seriously though,
How about joining a hobby club... miniature railroading, knitting, or collecting, to name a few?
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fides solus
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LIBRARIES... Hardware stores for the mind