Second day of riding. First flat. Swapped the tube out and hit the road.
Okay, that was the Reader's Digest large print condensed version of the story. I found my front tire was flat when it was time to go home. Rather than follow this guy's advice--who would've guessed he and I are two different people--the red-blooded American with the can do attitude inside of me inflated itself to 110 psi and a thunderous voice boomed, "I can fix this." Out came the tools. Off came the wheel. Then I fiddlefarted around for 10 minutes before finding that the hole was at the base of the valve stem. So Mr Fixit deflated, swapped the tube out like he should have in the first place, hit the road and got home 30 minutes late.