All mappers, particularly newbies, should take a look at http://keepright.ipax.at/ for sources of maplint.
I've noticed two maplint trends in Oregon: a) A bunch of "This node is not a member of any way and does not have any tags." Presumably, this lint was left behind after The Great License Change redactions. It seems like it would be a good thing to have a bot go through OSM and remove points that fit this description. Why is that not a good idea? b) I've seen a lot of people creating areas (playgrounds, buildings) then giving one of the nodes the tags. No no no. I believe if a business occupies an entire building, it's OK to tag the building, not just a node. In the case of playgrounds, it makes no sense at all to create an area then tag a node.
Anyone seen trends in their area?