Use my tool at http://www.arzinai.lt/useful/geocreator/geocreator.html
. There must be also lots of other tools for that purpose.
Zoom in to your location (the white crossed lines will show the center) and copy coordinates from two input fields from the left.
Some translations (in the case you use it):
"Rodyti" (show) - enter aproximate coordinates and click the button, it will take you there on the map;
"Pieti apskritim" (draw circle) - it will get coordinates at the position and put it to the list. Also it draw a circle (with given radius in km) and a marker;
"Paalinti visk" - remove all from the list
"Paalinti pasirinkt" - remove selected from the list
"Kopijuoti koordinates atmint"- copy coordinates to the clipboard (whole list of coordinates).
My Tourweaver components: http://www.optitecha.lt/categories/3