So to tackle this problem, I made this blackboard arrow, with the added bonus of key hooks (as I'm always losing my keys!) It was a bit of MDF we had left over from a big blackboard I painted years ago. Good old General Woodwork Supplies, cut it to the shape I wanted, then I glued it to the wall.
No more dirty marks, a little messenger board and keys ready to go!
The other spot for the rest of our keys and clutter is just here.....
Plus another bit of the blackboard in the kitchen!