If you want to enter GPS coordinates in web-based maps it can be a hassle to convert the coordinate systems depending on how you record them. There is a great website that does it for you and with one click will go to the web map you want. It is called leware.net and can be found at http://leware.net/geo/utmgoogle.htm. For a UTM set of coordinates, for example, just fill in the yellow boxes with zone 18T and hit the display button. It will take you directly to your location on the map, even in Bing Birds-eye view. This is a very simple and handy tool that I use all the time now to find locations that I record on my GPS. – Steve Young
A sample of page 1 of the website.