Google have just released a really useful (geeky) addition to the already excellent Google Maps. My Maps allows you to easily create custom maps with your own markers, points, polygons and notes placed wherever you want them. All of this was possible in the past but either required hacking about with Javascript or use of some third party tool. Here is a map I quickly knocked up to show my current and new work-places in relation to home. More help on creating your own maps is available in the Maps help section.