As a kid, my Grandmother weaned me off soda (and she wasn't sly about it---she outright told me what she was doing). At first, she got me to drink iced tea with as much sugar as I wanted. Once I got to the point of drinking tea out of habit, she then had me slowly lower the amount of sugar I added.

These days, I prefer unsweetened iced tea. I may add sugar to hot tea (usually black teas) but not often. I also found that soda tastes a bit odd to me these days.