Well, reading over my routine of writing down only interesting ideas, many of the ideas are still interesting. Reading over my freewriting, it's just a lot of "let me think of what to say, oh I bought a MacBook and played a game." I wouldn't even bother writing down an idea during the exercise, I tried once but I was tired by then and couldn't flesh it out.

That site has some cute charts that try to measure your mental state, I was curious to see what they'd show. I lasted 7 days, at the end charts got way off and I gave up.