I think it's rubbish when people say that if you restrict sugar for a child they go mad on it later. I always restricted sugar, gave fruit with full fat plain yogurt for pudding etc. Then when dc went to school there was just loads more sugar in his diet, the ice cream van parked outside the school, birthday sweets, kids having cereal bars at break. In fact, the school have intermittent "walk to school" days, where if you walked to school you get a very high sugar cereal bar. This is so misleading. Crisps are not allowed, but bars made of corn syrup and palm oil, they are fine apparently 
What I have noticed is that the nag factor has increased year on year, and that the more ds is given sugar, at school, at friends houses, and yes at home when I give in, the more he wants.
Sugar is totally addictive. I have stopped doing puddings at home now, except aforementioned fruit and plain yogurt, and we have cake etc at the weekends only, and a small sweet on Friday. I had sweets and cake as a child, but it was limited and a treat, so I am trying to get back to that.
I don't buy pasta sauces, or Chinese style sauces anymore either, and I can really taste the sugar in all processed foods.
I think the more we wean ourselves off sugar, the sweeter things will taste and the less addicted we will be.
I do make porridge on school/work mornings, just put it on a low heat in a non stick pan, shower, dress, it's ready.
I add mashed banana to sweeten it, or blueberry, raspberries etc.
Also make pancake batter the night before sometimes and keep it in a jug in the fridge and we have pancakes with a tiny sprinkle of sugar or some honey, but it's still better than cereal.(This is really the only organised thing I ever do!)