Hmm. Guilty as charged - I guess I do tend to see the word "diet" mean "eating something very specific or very restricted to attain a specific goal, usually weight loss". But GLC is absolutely right, diet does just mean the way you usually eat, as opposed to putting everything you come across randomly into your mouth 
Mindful eating is a good word. When I cook myself I try to eat food heavy on healthy stuff that I know my body responds well to, like lots of varied vegetables, nuts and legumes, healthy fats, whole grains, not much meat and at the same time avoid certain things for either health or ethical reasons, like factory farmed chicken. But I've never considered myself on a diet, because I'll eat anything I'm served or is available, and I never stress about something I've already eaten. It's more a question of trying to establish good habits for everyday use in the long haul, than what I will or will not eat.
It has equally much to do with filtering out what actually is a "special occasion". Family birthdays, yes, Friday afternoon, no.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett