You do know there is a minimap, right?
Make sure F lock is on (if applicable). Press F9 to enable map. Press again for zoom in. Press again for even more zoom in. Press again for Xray mode (normal zoom). Press again for zoom in. Press again for zoom in. Press again to disable. When you enable it, it will either be a circle that rotates opposite you rotate, or a square with an arrow representing you. Press shift+F9 to change modes. All other entities are shown as small red dots.
I don't know if this is what you are looking for, but it is there :P