HA! We can kick their sorry little a**es a thousandfold when we're up though!
(Couldn't possibly resist that one... )

To the question though, yes, I often think I don't get enough done and feel guilty about it. (I try to remind myself of the above though...that I've just got a different rhythm to it.) I always have a to do list going. Not that things always get done, not by a long shot. A lot of times, I'll get doing a bunch of stuff and realize at the end of the day that none of it was on my list. But it still counts! And if I really need to, I'll write it down, just to cross it off(!) I'm a visual person, so writing it down makes it concrete. Somehow makes it easier to give myself credit for it. Weird, but true.

I can be SUPER productive. It comes in waves and that's just the way it is for me. Consistency's great. It's just not me. And that's ok.
I just need to keep reminding myself of that.