The Satellite Alignment Calculator over at UKSatelliteHelp is a great resource that allows you to choose the satellite(s) you need to point your dish at, specify your address, drag a pointer to the spot on your home or building where the dish is, and from that determine the specific angle and elevation you need to use to get a signal.

It also provides a visual representation of the direction to the satellite by drawing a line on the map, so you can see what landmarks fall in the path of the line of sight.

It's a great tool and works great in the United States and elsewhere, not just in the UK. For example, all the Dish Network and DirecTV sats are listed and can be aimed with the information from this service, as well.

(via jkOnTheRun and Hacks)