I do the usual. Shower, shave, wear nice clothes.
The most "unique" thing I do is come up with conversation topics. If we had been talking for a while through texts and what not, I usually have a general idea of what topics they find interesting. I'll pay attention to the news, media, and make note of things they may find interesting. I combine that with my interests and try to have different things in mind so we're not talking about general boring shit like "How was the ride here?" "How was work?" I want something deeper.