At my urologist's suggestion, I gave up peanuts, cola and tea (as well as upping my water intake significantly).
He also listed chocolate in his top four offenders, but ... really!
Again, the recommendations given to me were specifically for calcium oxalate stones.
They sent me a longer list of things to "help limit your calcium oxalate intake, to help reduce your chances of another stone", but I thought it was outrageous. Still, you can see it here if you like. (Note: posted without permission)

This is one of the few sentiments I've found in life which seems to garner universal agreement.
The painful part of the stone's journey is said to be through the ureter (little tube from kidney to bladder).
What nobody told me is that this little jaunt can take weeks. A little progress (with pain), then maybe it will get stuck for a while and you can get back to playing polo, or whatever it is you do to pass the time.

The tiniest grain-of-sand sized stone can put you out of commission.
How on earth Big Bertha made it though is boggling my mind.
And yes, before you ask, unlike the others that one did get my attention when it made final egress.

Perhaps a big one was taking a long time through the ureter - causing pain when it shifted - and small bits broke off from time to time (this is the Breakaway Republic after all).
Mr. Small comes out and immediately gets apprehended and indicted.

A little background: this saga began in March '09, and a few days later when I thought I'd recovered I heaved a sigh of relief saying I'm sure glad that's over with!
It was not over with, but it was 3 months before I found out. The dormant periods got shorter and the Damocles effect increased.
Then - Big Bertha, less than 3 weeks ago as I write this but it feels like a surprisingly long dormant period.
So, although I'm starting to wonder, it will have to be quite a few months before I stop looking up.