- Not playing Ocarina of Time at the time.
Buying a PS2 in 2001 because my Dreamcast died when they stopped making new ones. I believe the store only offered me £149 credit, what I had paid for the Dreamcast, and I put it towards a PS2 with Gran Turismo 3. Wish I had kept the credit and pre-ordered a Gamecube. I didn't jump on the Gamecube bandwagon until 2003, but part of this was because all my friends had a PS2.
Selling all my magazines.
Selling my N64. I had it since 1998, and sold it to a friend two years ago. I think because I've had it since it was new, I hold some sort of affection towards it, rather than the second hand consoles somebody else grew up playing.