Weigh yourself before the challenge begins, and then at the end of the week(s) and see if you notice a change. (Tip: Weigh yourself in the morning before eating breakfast when your body is empty.) If you can't cut out all soda, then try at least cutting your consumption down. Replace when you would have soda with water or unsweetened ice tea. If you add a slice of lemon it sweetens our drink naturally AND gives you some benefit of the citrus. If you can't do unsweetened ice tea try ordering unsweetened and adding sugar packets. Add no more than 5 packets. (there are 10 packets per 1 can of soda. Source: http://www.onecanofsoda.com/)
This will do 2 things for you. It will cut your sugar intake in half AND you will be adding the flavonoids of the tea to your diet which is healthy for your body. Both black tea and green tea is good for you. If you buy an ice tea, check the grams of sugar in it. (some are sugar free) 4o grams of sugar are what is in a typical can of soda. So the goal is to cut down on the sugar, while increasing the health benefits of what you are putting in your body. I make my tea by heating water and brewing 1 cup of decaffeinated tea and 1 cup of caffeinated tea and pouring them together to cool in the fridge. I add ice and lemon before drinking. Thankfully most fast food places do offer an unsweetened ice tea. (I had some at Wendy's yesterday.) When ordering unsweetened tea in restaurants be aware not all will taste good. Default to water if this happens to you. And keep trying! As we all know, some restaurants are better at some things than others.
I haven't had a soda in months and I really don't miss it any more. Whenever I got tempted in the past I would just think about what little nutritional value it had for me, (none other than being a liquid) and I would make another choice. FMI about the health benefits of tea check this article out: http://www.webmd.com/diet/features/tea-types-and-their-health-benefits Cutting back on soda or phasing it out completely is just one way you can eat healthier. Then once you get the ball rolling the rest will come too.
My scale said 108.4 this morning. I swear on my whole families life I am not even trying to lose weight at this point! I am just as surprised as you are. And before anyone freaks at that number I am only 5'1". I am also still eating a LOT of food! (including the occasional fast food meal and cookies) I do still have a bit of the "Mummy Tummy" from birthing 2 kids. It is finally going away! I never thought I would see that happen. Eating healthy just works. Trust me, if I can do it anyone can!!!