QuickAddressCopy (an OllyDbg v1.10 plugin)

This tiny plugin allows you to copy the address of the selected item/command/byte with the Ctrl+X keyboard shortcut.

Note that the plugin works only for OllyDbg v1.10. For OllyDbg v2, you can achieve the same with:
Options -> Edit shortcuts… (“Copy address” in “Dump: Edit”)