First I am DYING to know how you went years without a flat. What do you attribute THAT to?
More importantly, what can the rest of us learn from you so that we can duplicate that performance?

AS for what to do going forward, I have two words for you: tire liners.

I swear by them. I wont recommend one brand over another, as they all seem to work about the same. I'm currently using, "STOP FLATS," for no more reason than I got a good price on them.
But there is something about liners, and its not just the layer of protection they offer against punctures. I don't know how to explain it, except to say they somehow "harden" a tire, even seeming to make them hold pressure longer. At least that is my observation.

I also carry a fresh, spare tube, a CO2 inflator kit w/levers and a Presta-Schrader adapter (the CO2 inflators never seem to do a good job of mating to the Presta valves, so I have the adapter)