What price do you pay for a calorie?

Have you had one of those 100 calorie snack packs?  Who even thinks twice about 100 calorie packs?  100 calories sounds so small.  Those stupid packs are so small.  They almost don't seem worth spending 100 calories.  Yet at the same time, 100 calories doesn't sound like a lot, does it? 

What is the cost of eating 100 calories over your daily allotment every day though?  An extra 100 calorie pack doesn't really seem like a big deal.  But eating only 100 calories over your limit every day will lead to a 10 pound weight gain at the end of a year. 

And a calorie is a calorie when we're talking about going over.  Whether I've eaten a carrot, watermelon or candy, if I go over what I should be eating on a daily basis, I'm going to gain.  Don't get me wrong.  I have always been an "everything in moderation" girl and am now a recently reformed "bread is bad" girl.  But I don't know that it necessarily leads to weight gain.  Does a bread calorie really carry more weight than a veggie calorie?  I don't think so.  I just know that I FEEL better when I'm off the sugar and bread. 

I've been keeping a careful eye on my daily food intake and usually don't beat myself up if I go over by 100, 200 or even 300 calories.  Now I'm going to be a little more strict with myself.  There's no point of getting up every morning at the butt crack of dawn for the gym if I'm just going to eat like a little pig and ruin my hard work.  

How is everyone else doing?