Although everything seems to be electronic these days, I still prefer a paper engagement calendar for my personal use. I write all sorts of things in it - appointments, vacation information, when I start yet another diet, my exercise, etc. I actually have kept several years' worth, which I can go back through and reminisce about various endeavors (sort of like a diary, without having anything too incriminating!). I purchase the Sierra Club Engagement Calendar every year (with a couple of exceptions of when I didn't, which I later regretted). The spiral binding makes it easy to flip through the pages. There is ample writing space for each day. And best of all, the photos of the animals and scenery are absolutely spectacular. (Wish I could take pictures like that!)