Debate: patch the inner tube or just replace it after a flat?
I got a flat last Tuesday on my commute down Market Street in Philly, right near the bridge. It was a slow leak from a tiny piece of glass, and I was already 20 minutes late. I pulled over and had to decide fast: pull out my patch kit and spend 10 minutes finding the hole and patching it, or just swap in a spare tube I had in my bag. I went with the spare tube since I was already running late, but now I'm sitting on a punctured tube at home wondering if I should bother patching it. Some folks swear patching is fine for small holes and saves money, but others say tubes are cheap enough that it's not worth the risk of a bad patch failing later. What do you all do when you're in a hurry and get a flat on your daily ride?