most useful things you can 3D print at home?

[sophiedeacon295]

When I think about getting a 3D printer, I can imagine dozens of toys or knick-knacks that I could create with it.

But with current printing tech, I have a harder time thinking of utilitarian objects.

What useful stuff do you 3D print at home, or plan to 3D print? Office supplies? Zip-ties?

Lightswitch covers?

I don't expect a 3D printer to pay for itself,

but it would be nice to say
"I never have to buy X again if I buy a 3D printer."