Thoughts lately have focused on things we don't notice, or don't realize until much, much later than we should have:
1) The robotic voice on the Beastie Boys' "Intergalactic Planetary" song is actually saying, "Intergalactic Planetary." Yeah, whoops. Didn't pick up on that til about a month ago.
2) For Mac users: the iCal icon down on your dock has the right date on it. Realized that today.
3) My house is populated with females, so I don't often notice that the underside of my toilet seat needs cleaning, b/c well... I never find it necessary to look at it. Apologies to the b/f :)