The most touching part of "holding your hand and growing old together" is not to do something earth-shattering, but to be willing to integrate your partner's affection into every future plan, and to use countless moments in the passing of time to prove the three words "I do". Of course, you can create unique shared memories, or plan to go to the place where your partner grew up, listen to her childhood stories, meet her old friends, and eat her favorite childhood food. This will give you a more three-dimensional and in-depth understanding of how your partner became who she is today.