My mom told me this YEARS ago; This is the BEST advice anyone can give. People say they are just venting, but others don't forgive and forget the things you say about your husband because they don't love him like you do. Sometimes the only way people know your husband is through you. Build him up. Always.
Wedding guests write notes and slip them in whatever year bottle they want. Open it on your anniversary that year.--this would be especially special for the later years where maybe some of the people who put something in those bottles passed away.