What about setting strict parameters for your
collection. Say, mine used to be only GMTs
and Chronographs, but the temptation was still
there. I upped the ante by saying only in-house
movements, now that's more difficult. Every
watch now undergoes scrutiny as even some
manufactures use 3rd party movements. The
other thing is put your money into something
bigger, like investing on a house or another
property.

This does not completely work but at least
tones down my purchasing considerably.
Cheers