90/10 - maybe if you are maintaining. I would be more like 95/5
Here is an idea for those unhealthy snacks - when you get home from the grocery store break up the portions into little baggies. I do this with chips, crackers and cookies. This will teach you what a portion is.. and you might stop at one baggie.
If I really get a craving - normally it's licorce - I buy some. I go to the store and get a single size bag. If I don't give into my craving I will eat everything else first and still buy the licorce.
Hope this helps