I'm only in my second year of such communal organisation.
It was a ritual I'd never experienced, because until not so long ago I had lived for years with lodgers, whose comings and goings were none of my business and vice versa, so my own Moleskine page per day pocket diary was all I needed. Now that boyfriend has replaced lodgers, the joint planner has a place on the back of the kitchen door (pictured above).
The Crispin Finn wall planner, above, is £14. Having been feted in recent years by the likes of the Creative Review and Grafik Magazine, and on sale at stylish haunts including The Peanut Vendor (whose owners' gorgeous rented flat you can tour here) it is the go-to good-looker of the bunch. And it arrives in a pleasing brown paper bag, so it makes a great gift, too (that is if you know any other disorganised types who haven't quite got around to focusing on 2015 yet).
Food Guide UK's Etsy shop.
It doesn't (luckily) come framed, or it'd be pretty useless, however it does feature glamorous gold foil detailing on a clean, white backdrop and is A3 size, so handy for compact rooms. It's £18.95 by Milly's Cottage at Not on the High Street.
YoPC Etsy shop, where you can also find their A4 wall calendars in the same style.
Some of the above can even still be ordered to arrive for Christmas as if you're as disorganised about your festive shopping as you are about your planning.