Buy used electronics. Something that will be genuinely be helpful to you. Or just have hobbies that involves material things like 3d printing, cars, biking, guns, etc. Obviously some are much more expensive and/or time consuming than others.
Just this other day I bought a used pixel to flash graphene on it. Been amazing so far. It genuinely provided me a security advantage in organizing while not succumbing to the caveman shiny object trap. Drool over the practical application, not the aesthetic itself.
Please carry a pepper spray or something better, and train how to use it.