When I gave up soda, I did it by drinking water-- every time I went to grab a soda, THOUGHT about grabbing a soda, or even SAW soda, I drank a glass of water instead. After a few weeks, I was off soda for good, and onto a healthy water habit.
People say to drink a lot of water. But water gets boring. So, I drink seltzer (sparkling water) instead! I personally like plain seltzer but there are a lot of different flavors that have no calories. With seltzer, it's a lot easier to drink more water and use everyone else's water-related-secrets
I love seltzer/sparkling water but really don't like schlepping all those heavy bottles home. I recently purchased a SodaStream seltzer maker and it's WONDERFUL. Fresh bubbly water, no calories, no more plastic bottles, and no more breaking my back! They also kick in samples of flavors to try out.
Juice can be high sugars and calories. However, if you cut it with water, it lasts longer, tastes less sweet, but just as satisfying, and keeps those calories in check. Instead of water, use club soda for a great soda substitute! I now only use a splash of juice for flavor.