You answered it yourself.

If you want a sugar fix eat some fruit (apple etc), least then you arent getting e-numbers and instead getting antioxidants etc into you

drink blackcurrent and water and have an apple
once youve gone a week without fizzies you are on the way to forming a permanent 'normal' habit.

Get the salad sandwiches into your diet-- if you have to, put a bit of low fat dressing on it to make it more palatable.

its just really simple easy stuff you can stick with.