We spot and stalk them. We take a good pair of optics, good boots, and a white hanky for flagging.
Another tool I used last year was a mapping compas! The past summer I attened SCI's AWLS and learn how to use one. So one day during rifle (*gasp* I said the "R" word!

) We spotted a pair of does about 3 miles away. Problem was there was no way to stalk them with out being seen. So I pulled out the Brunton compas and set it. We then went back to the rig and drove around along the highway till we got to the phone pole we'd used as a marker. Using the compas it lead us right to where those goofy does were bedded! GREAT TOOL!