Ibid. is an abbreviation for ibidem, meaning "in the same place." Use Ibid. as shortened form when you have cited a source in the preceding note. Don't forget the period at the end.
First Note
1. Doug Fine, Farewell My Subaru: an Epic Adventure in Social Living, ((New York: Villard, 2008), 45.
Next Note, Same Source, Same Page
2. Ibid.
Next Note, Same Source, Different Page
3. Ibid., 36.
Pay attention to the punctuation! Since Ibid. is an abbreviation, it needs both a period and a comma before the page number.