When talking about what you might do to improve or enhance your marriage, write it all down.
Firstly, it shows that you are taking the conversation seriously. And you will also have a good recording of what was shared; this will help you remember.
The act of writing it down is not only so you remember but also to help create silences. If you write down what they say, there will be some time between when they finish their sentence and when you finish writing it down. The other person may want to fill in those silences, which can lead to a deeper and richer conversations.