Drink a glass of water.

“I drank EXCLUSIVELY coke for most of my teenage years and into my 20s (added beer in there). I had no idea how terrible I actually felt. Here's the process that helped me: Before I drank a pop, I drank a glass of water. Then I added a glass of water at the top of every hour. Then I restricted my pop to meals Then just dinner Then just 3 a week Then one a week Then none (it didn't take much) I lost 50lbs doing that, and my headaches disappeared, and my joints hurt less (probably a combination of hydration and weight loss). Now I'll have a diet pop once in a while, but it's rare. One a month maybe. I sleep better, I feel more energetic, and I'm less fat.”

“Tuesday was a long day because I had class in the morning and afternoon, and only a small bit of time to get home, start some homework and eat before I was back at school for a sorority event. I did carry my water with me all day, however I decided to try something different. I don’t like the taste of water, and that may be the reason why I don’t drink enough of it. I do however love the taste of lemon water and could probably drink a litre of it, so I started adding lemons into my water. [...] On my way to sorority, I realized I had forgotten my water bottle at home and was desperate for water during the event because my mouth was so dry, running in and out of the room for a water fountain.”