Yesterday I went to put some POIs on the map. It is amazing the number of shops you can find in a small commercial area. So that you have to focus on specific types. I usually take notes of these ones: pharmacy, supermarket, restaurant and bank. And also public buildings. In fact, I like much more to map buildings because you can draw them on the map :-)
The area I went yesterday is one of the many places forgotten by google maps. It gives me extra motivation to go there and map!