I was in a long-distance relationship once, and my girlfriend would complain about how I didn't email her enough. So I put together a quick perl script that would send her a message and the output of fortune for a bit of randomization. Then I used cron to run the script every morning, so she'd get an email from me every day.

She was very pleased for the first days, until she realized that it was automated. But even after that she was pretty impressed and appreciative. A year later, we're married, and she's still getting those messages every morning.