Sounds very sensible, I was approaching things much the same way - watch the carbs, monitor what's going in v. what energy is being expended in return. It's not rocket science, but hard to do sometimes, that's for sure.
Well done, you! Hoping to get back on the wagon again, I've walked twice so far this week, only 3km each time and not walking that fast, but hoping to keep building up slowly and surely. It's not a patch on what I was doing, but I guess baby steps for me for now.
Before I got sick, I was really enjoying using the Nikeplus app, it's awesome, you can track your progress, how fast you're running, distance, calories burnt, etc. If you don't have it, can highly, highly recommend it, I found it a huge motivation. Join up online and download the app