PMP: my grandmother used to lecture me on the War and starving children in Africa - that made me eat. I was a very flexible eater when I was little but e.g. in my sister's case my parents would just flat out not give her anything else until she ate for example 3 brussel sprouts. They made it into a game: when she turned 6 she had to eat 6 brussel sprouts, etc. I think she kept up with it till she was 12! My parents were also veeeery good at mindgames: mmm apple with cinnamon, juuuust like candy; cereal, juuuust like crisps (that one wasn't too effective though apparently...).