I'm thinking of things like:
- Buying a plain white T-shirt for $100 because of the name on the label inside
- Getting the biggest mortgage you can, buying a McMansion, and spending an extra $500,000 in interest over the next $35 years
Often we don't realise how much we base purchasing decisions on "everyone is doing it", without researching properly or even just stopping and thinking about it for a second. What other examples can you think of?