I’m getting one of these to put next to my desk. They’re from Clerk Ink Well, here. I found out about them because they’d pasted one onto the side of Holy Redeemer, the church in Exmouth Market - nifty advertising.
I really like these personalised House Rules from More Than Words - you write the text yourself and they do the rest. They don’t have to be House Rules, obviously - you can make them say whatever you like, in whatever colours and fonts you choose: Here’s Why I Love You, or Here’s Why You Massively Annoy Me, or The Best Things About This Year, or whatever. Would make nice Christmas presents, and not just for children.