Read the newspapers over the weekend and have a few current affairs topics ready, preferably nothing too dry, and nothing on which you have outlandish opinions.

Travel is good. Where you would like to go will do if your haven't actually been anywhere so long as it might actually happen rather than being a sad fantasy. Films books and music also good (but see outlandish opinions, avoidance of, above).

She's meant to be having fun so avoid anything depressing.

And don't feel the need to carry the conversation yourself. If its going well she'll do her share. If its not going well give yourself a polite out and quite rather than babbling to fill the silence.