Cravings are triggered by:
What time is it?
Where are you?
What emotion were you just feeling?
What event just happened?
TIME: Around 7:00pm I start craving something sweet.
LOCATION: When I walk into the living room I start craving TV.
EMOTION: When I feel stress I start craving chocolate.
EVENT: When school gets out I start craving my phone to check Facebook or Twitter.