* Formal: "Come hither, my dear, and let me tell you a secret."
* Literary: "The wind howled, beckoning the weary traveler hither with a promise of shelter."
* Humorous: "Hither, ye scurvy dogs, and hear the tale of Captain Jack's latest adventure!"
You'll likely find "hither" used in older literature or in situations where someone is intentionally using an archaic style for effect.