If you comment, and I can ...
1. I'll respond with something I like about you.
2. I'll tell you what artist/song/movie or other item reminds me of you.
3. I'll name something we should do together.
4. I'll say something that only makes sense to you and me (or just me).
5. I'll tell you my first/clearest memory of you.
6. I'll leave you a quote that is somehow appropriate to you.
7. I'll ask you something that I've always wondered about you, if I have such a thought.
8. If I do this for you, please post this on your journal so you can do the same for other people