I recently made a tough change for me--giving up my Diet Cokes. I had decided over a year ago to try to give up my two-a-day habit. I wasn't comfortable with relying on caffeine to get through the day. I didn't like the aspartame in the diet drinks. My sister (the one with the Ph.D in Chemical Engineering) wouldn't touch the stuff anymore. I knew it was a bad habit, but, like I told a few of my friends, it's almost like I liked doing something that I knew wasn't good for me.
Well, one day in May I just decided enough is enough. I had dropped this habit when I was pregnant, and I could do it now in preparation for another possible pregnancy and just for me. It was something that I wanted to conquer, so I did. I had read a tip--don't just give it up cold turkey. Instead, make a switch to something similar, like a different brand. I originally gave up my Diet Mountain Dew habit this way--I switched to Kroger brand Diet Coke. It didn't phase me at all. This time, I decided to switch to Sprite. Yes, full-calorie Sprite!!!! I couldn't imagine wanting to drink that stuff, but sure enough, on my first day without Diet Coke I craved something in a can that first morning. So I drank the Sprite. And even a second one that same day! At 140 calories a can, those calories added up quickly.
The switch was going fine until the marathon on June 3rd. Yes, I made it through caffeine headaches and was even able to have two Diet Cokes in my fridge that I didn't touch for a couple of weeks. After the marathon, I was injured and running less. Those 140 calories a can were not getting burned off much as I went from 50+ miles a week to probably 20 miles or so. I don't weigh myself, but I imagine that I began gaining weight from those extra calories. I didn't know what to do and even contemplated going back to Diet Coke.
Thankfully, I gave it some more time and broke the habit for good. It's been almost two months. I now drink maybe 1/2 a can of Sprite a day. I am back to running 40 or so miles a week. I prefer a nice tall glass of water in the morning and even with dinner (my two weak spots for Diet Coke). I have given up a bad habit and formed a healthier one instead--a good thing since temperatures have been record-breaking this summer, and I'm drinking all the time!