Looking back now, what do you regret having spent so much money on?

Brand new technology!
New versions are often replaced by another brand-new version within the next few months and the price of the "new version" you've just bought drops significantly.

It is just a hype and not worth the extra money! :[ (cue to overpriced Apple product...)

Hope the above helps a little! :)

Tuition!!!
I regret forcing myself to study just for the sake of it and not truly learning & discovering what I enjoy. Wasted lots of money on tuition when the real issue was the mindset towards studies, anyone feel me haha