We've all bought stuff we later realise is a complete waste of money. We kick ourselves, we learn a lesson or two, and then we move on. What's your most regrettable purchase, and what did you learn from it?
It might be something small that taught you a lesson about impulse buying. It might be a large purchase that really put your personal finances into perspective. However long it took to recover from it, however big or small it was, we want to know about it.
So tell us — what's the most regrettable thing you've ever spent money on, what did you learn from it, and how did you bounce back?