Mine has his own large whiteboard calendar. He didn't use it for the first three months, but I kept it updated with only events we had committed to together -- soccer game next Saturday, kid's birthday party in two weeks, etc. Minimal information, plain black and white board. Over time, he started crossing off the days himself. Now, when I get a week or so behind, he reminds me. Sometimes he'll even scrawl his own appt on there himself. Maybe slow introduction would be best for your guy too, @Sweetpea76. I don't know how helpful the calendar was for him in the beginning, or even if it's helpful for him now, but I think just getting into a routine of checking it each morning was helpful. Also, it was his own board and I didn't put all of my little things on it, so it was straightforward for him and for things only concerning him.