For quite a few years, I have made my own calendars, I know. OCD. But I want my calendars to have large squares with lines to write in appointments neatly. It has to be on a non-glossy paper, so I can write with pencil...you know, 'cause I don't like how messy it looks to scratch out. I also like to have room to write notes. Thanks to Microsoft Publisher, I have been making them to my exact needs, and printing them out on cardstock. Added benefit is that the 3-hole punched pages can go in a binder to refer back to things like oh, doctor appointments etc.
But it's kind a pain to check and double check to make sure you get all the dates and holidays correct. It could be disastrous if you get off by a day. Especially since I also made a duplicate for a friend who somehow convinced me that I needed to keep her on track and on schedule. :)
Then last fall I happened to come across a commercially made calendar that ticked almost every single box on my 'needs' list. The paper is a little glossy, but a pencil writes on it just fine, so it's good. It has some cute artwork, but it doesn't waste the whole top half...there's plenty of room for the large squares...with lines...and a place to write notes.
And the best calendar tip I ever learned was from flylady who taught me to hang your calendar where you actually see it first thing in the morning and last thing at night...the bathroom! TMI? :)