When I was younger, and better behaved when it came to food..................... I had a few tricks to satisfy the sweet craving.
(apologies if any of this has been mentioned, I haven't read the other replies)

Yoghurt with my favourite fruits added, topped with toasted muesli. (frozen yoghurt is awesome for an 'icecream' hit)
Bananas ALWAYS cured my chocolate cravings. I have no idea why or how, but they did.
And nothing beats a good old 'health slice'. Muesli, nuts, honey, dried fruits etc.... yummy. I don't have a specific recipe, sorry.
My other favourite was eggwhites with tuna. It always kept me full and satisfied for ages. Hard boil some eggs, cut them in half and scoop out the yolk. Then spoon in some tuna (flavoured or not, but watch out for oily ones) and top with a squirt of low fat mayo. Oooohhhh delish. And fancy looking.

Hope that helped!