A lot of everyday spending is really a waste of money. Here are websites where you can admit your wastefulness, examine other people's spendthrift ways, and learn how to correct yourself.
Spendster.org. See the adult who bought a Harry Potter sword, a kid who spends money on guitars but can't play one, and a woman who buys anything with a sunflower painted on it. Spendster.org asks people how they've wasted their money, then calculates what that money would have been worth if invested wisely. Upload your confession video.
Big-ticket waste. Yahoo Finance offers a selection of big-ticket consumer purchases that don't get used - at least not much. Among them are swimming pools, outdoor kitchens, and espresso-makers. As one commenter notes, a number of the listed items are of the sort you should buy used, if you buy them at all, including exercise equipment and that espresso-maker.