This is an incredibly sweet idea. "Open when you need to know how much I love you; open when you don't feel beautiful; open when you need a laugh; open when you miss me; open when you're mad at me; open when you need a date night, etc.
Get people to write a date night idea on Popsicle sticks, put on the guest book table. Date Jar - Romantic DIY Gift. Pick a few nights per month and draw a paper with an activity for just the two of you.
2 year anniversary gift for him! This idea is so cute! That would be way to much to do for the five years we've been together, though. I'll have to remember this as an add on for our two year anniversary of marriage.