When calling a fellow employee for something that literally takes them one second to do:

If they don’t answer the first time…do not immediately leave them a message.  Why?  Because they then must log into their voice mail, listen to your message, do the simple-ass thing you needed, then call your fucking ass back just to tell you they did it.  Before putting them through all that extra bullshit, do them a favor, and at least try to call them one more time before leaving the message.  That’s just common fucking sense you lazy twit.