Reference back to something that was said on a previous date. This shows that you were thinking about the date since the last time you spent together.
“I want to circle back to something you said last time. I want to better understand it.”
“I was thinking about what you were saying last time, and …”
“Last time you mentioned [whatever], I just saw a video about that. Do you want me to send it to you?”
“You mentioned that you like [gardens]. I thought it would be nice to go there today.”