1. A method for encouraging healthy habits by an individual, the method comprising: detecting, using at least one computer system, a particular consumable item purchased by an individual for potential consumption; determining, at the at least one computer system, a plurality of separate health index values each associated with a separate one of a plurality of health index components for consumption of the particular consumable item; and selecting, at the at least one computer system, at least one electronic incentive for the individual based on the plurality of separate health index values matching at least one health index value requirement specified in a database of electronic incentives.