I reset when I accidentally misplace a public project, definitely. And then I'm planning to reset tonight when I get my Fireworks ticket. If it's not for the Boxed Figurine or Lovely Phone (2 wish list items), then I'm going to turn my DS off and try again.
Also, resetting for Pictures when you give villagers rare items... That's a really good idea! I might have to try it. So far I've gotten 0 pictures, even though I send letters pretty often and do most of my villager's requests.
Once.. Because I accidently sold a rare fish. To the person who ate the turnips, usually I end up buying too many (no more can fit into my locker) So i normally eat a couple 100' it's only like 9k a 100 so it's not that bad.. Richpeopleproblems; LOL