Heroides (21 poems, "letters" from famous heroines to their lovers)
Amores (3 books, 49 poems on the subject of love & Ovid's lover Corinna)
Ars Amatoria (3 books, appx 750 lines ea, about seduction & its techniques)
Remedia Amoris (814 lines, teaches a "cure" to the love presented in the Ars)
Ibis (644 lines, in which Ovid curses an unnamed enemy while in exile)
Tristia (5 books, 50 poems, Ovid's life in exile and apologies for his works)
Epistulae ex Ponto (4 books, 46 poetic letters asking to be removed from exile)
Metamorphoses (again) (15 books, about 850 lines each, dealing with mythology)
Medicamina Faciei Femineae (100 lines extant, a parody about women's makeup)
Other/Multiple (please tell me in the tags!)