Oh wow...it would have to be a toss up between Clorox wipes (so incredibly convenient) or Spot Shot (carpet cleaner that works great as a laundry spot remover too!)
I recently discovered the Swiffer Duster and I love it! I also recently bought some of that Clorox greenworks stuff. I like the smell so that would be one of my favorites too. I mop the floor with it. I am obsessive compulsive about keeping my floors clean. I can't stand stuff sticking to the bottom of my feet if it's dirty.
Humm this is a tough one...when it comes to my kitchen, i'd say it's a tie between my Magic Eraser and my Lysol disinfectant spray or clorox wipes (whatever I have around).
Around the house, definitely my Woolite Pod!!!! It's aweseome for cleaning up the messes the critters leave behind! Every pet owner should have one of these, they're really good when it comes to fur balls too!