Finding both Uranus and Neptune helps if you have a map. Unless you know what you are looking for it can be near impossible to identify them as their disks are so small, particularly Neptune's really just stellar.
This link will take you to the Sky and Telescope current Uranus/Neptune locator map. I used the corresponding map for last year to find them for the first time:
http://media.skyandtelescope.com/doc...ptune_2010.pdf
A little tip with finding them, Uranus has a distinct greenish/blue colour to it, and high magnification will begin to define its disk which surrounding stars don't have. You can see this bugger through binoculars, even from Sydney.
Neptune is a very special character. The only way to identify it is with its striking blue colour. 'Blue stars' appear almost white, and very bright for their colour saturation. Neptune's colour is very blue, and 'not bright enough' to be a star for its colour intensity. You really won't make out a disk on it, unless you have access to special gear and very, very particular atmospheric conditions. Just keep in mind that you will need to look carefully and patiently for it. It isn't an immediate standout feature.