Hey, if you're not willing to cut off your hand and have it replaced by a hook, are you sure you even deserve respect at work? Besides, if you have a hook, eventually someone will ask you what happened to your hand. And you can reply, "I sacrificed it for wisdom."
But I suppose you could hire some minions to follow you around. Or have a girlfriend as evil as she is beautiful on your arm.
If neither of these suggestions are to your liking, you could at least cultivate a sinister laugh.
Arranging to have your enemies mysteriously vanish, can also gain you serious super villain cred in the workplace.
Starting a rumor that you're a genetically engineered superhuman could work. Try quoting a lot of Milton's, "Paradise Lost," to really sell this one.
Do you ever wear a magical amulet with unspecified, but potent, mystical powers? One about the size of a pie plate, worn over your Nehru jacket? If so, earn a doctorate in some field - maybe The Influence of Gozer During the Third Reconciliation of the Last of the Meketrex Supplicants; or Necromantic Practices of the Early Aztec Civilization. So everyone can call you Doctor decogeo. (The choice of university from which you earned your degree matters. A doctorate from Brigham Young doesn't intimidate nearly so well as one from Rheinisch-Westfälische Technische Hochschule Aachen.)
Keep a pet panther in your office. Call her Veronica. Have conversations with her in the presence of your co-workers. Every now and then, say to her, "Granted, that would solve the problem for today. But the Ruling Council warned us that they wouldn't be so lenient if we tried it a second time."