This was touched upon briefly, but Lemon raises the issue that most the problems that need spells aren't practical things, but petty trifles. I myself noticed the problems seem to be those that most greatly affect teenage girls, or more precisely, cat-hoarding old maids. The spell of vengeance against gossipy neighbors made me laugh heartily.
Also, I want Bunnybread in every episode to read the featured sites' about page as a commercial radio spot. Slays me every time.