How much is ok?
With my first, I could curl up on the couch and sleep whenever I needed to do so. With my second, my first was still so small, she though snuggling on the couch watching Dora was awesome, even if it was really because I was too tired to do anything else.
But now there are carpools and dance lessons and swim meets and basketball practices. Plus, we home school so I have to stay on top of their lessons.
I'm exhausted but curling up on the couch is not an option! Caffeine! I need caffeine! I just don't want to over do it. I know "two cups of coffee" is what everyone says but I drink Coke. Is two cans a day safe?