I just installed iStat menus from iSlayer and it’s pretty cool, but the date/time is just too far to the left. So I figured I would try and move it over to the right where the date/time used to be (I turned it off since this one now has the day displayed as well). With a few trial and errors, I figured out it’s just hold command, click and drag the item to where you want. Simple. Gotta love OS X’s simplicity and reorder OS X menu bar icons is no exception. If this was Windows, it would have probably required a reboot.