One of the most effective ways I've found to keep some semblance of order in my home (and with 3 kids that's not always easy) is to never leave a room empty handed.
Now, sometimes my hands are full of kids.
But if I'm leaving any room, for any reason, and I don't have a child or two in my arms then I'm carrying something else that needs to be re-homed. Maybe it's a dirty glass that gets put in the dishwasher, some forlorn stickers that need to make their way to the trash, a child's coat that needs to be hung up, or a basket of clean, folded laundry that needs to make its way to the bedroom.
It can be large or small. But this small simple act of moving one (or more!) item out of it's misplaced position to the right spot will do wonders for keeping things a little less cluttered on a day-to-day basis.
Still looking for a New Year's Resolution - Never Leave A Room Empty Handed just might be it.