I've had a tube fail (close to home) just after replacing it. I popped a slimed tube after inflating to the pressure I like by running over a piece of glass (small, like the toe nail on your small toe small) after several storms. I also had a slow flat but didn't notice that until the next day.

I can't remember how many flats as a kid I had....

Most recently, I had a sliced rear tire but no flat yet and it has been replaced already.

Now, all this yaking I am sure I have just jinxed myself for this weekend's rides!