Getting the coordinates of a location on Google maps isn’t as straight forwards as one may expect. But, as usual, if you know how, it is easy enough. And, there are actually several ways.
What’s here? Click the desired location on the map and use the right mouse click to get the context menu. Once you’ve clicked “What’s here?”, Google Maps will automatically display the (latitude, longitude) pair in the Address search bar at the top of the Google Maps page. See also here.
LatLng Tooltip: you can enable the latlng tooltip in Maps labs, which you can find in the left panel at the bottom, as indicated in the screen shot below. See this post for further steps.
Where to find the map labs option
Latlng marker: In the same post, you can find a third option, which is the LatLng Marker. It adds an option to the context menu to drop a marker to display the latitude and longitude of that spot. See here for further instructions.
You could also just use http://lookuplatlong.com, it’s pretty quick and you can search by address, business name or just town/region