Here some ideas:
"Operation Flashpoint: Dragon Rising" uses a circle-menu, where you move the mouse into the right category of the displayed circle, which feels fluent and tidy.
The old "S.W.A.T 4" game shows a long list of options depending on what you looking at. You scroll through all the possible options until you get yours - this was possible because you always saw it in one view.
In "Battlefield 3" the button you have to press appears in the UI as a hint, even for reloading (R), jumping of a damaged vehicle etc.
(The image is an example for the circlemenu from "Operation Flashpoint: Dragon Rising")