depending on how much you work out etc, 1500-1800 calories/day is a healthy option. You'll lose weight slowly but will probably be able to keep it of.
Results also depend on what you eat; this is just as important as how much you eat (!).
Try looking at www.foodfit.com
and mayoclinic.com, and free-cooking-recipes.com for more god ideas.
wish you lots of success,
from Athens, greetings from Greekgirl