I'd also add the regret of not buying something you later realize was a unique opportunity, and wish you would've jumped on in the moment! I've learned that th

I'd also add the regret of not buying something you later realize was a unique opportunity, and wish you would've jumped on in the moment! I've learned that there are so few things that I genuinely feel an itch to buy, that should I come across one (say in a shop window, or a stall in a craft market) I should buy it. So many times I've seen something interesting, thought "okay I'll take a picture and research it and decide later", and I don't think I've ever actually returned a single time -- although I have regretted not purchasing it. Sometimes in life you have to capitalize on the moment - it may not come again!