Pushup Challenge! - On to Week 3

I just pulled off 99 pushups inside of a half hour. Granted, these weren't all consecutive, but they were as prescribed by the third tier of the first day of week 3 of the pushup program. I'm really glad I can do this many, I've been feeling better, and I'm liking the way I look better.

For some reason, I'm significantly more thirsty now, so I've been drinking more soda. Then I realized that was just counterproductive. Thus, I have switched to having a liter of water and some aspirin for my morning wake-up cup. I'm still having a soda each afternoon, but it's been a goal of mine for a long time to really kick this need for it.

I quit drinking soda for a while in high school, then went back. In college I switched to diet, which kept me, as well as my roommates, from drinking my soda. Eventually, I relapsed. I keep thinking that it can't be that bad for me, but if that's true, why can't I give it up for a period longer than 6 months?