One of the fun ways you can keep in touch with a friend is by giving him or her an alert when their favorite celeb's birthday arrives. This is especially true if they share a birthday with them! It's a silly yet individual way to say "hey" and give them something fun to think about that day.
A few years ago a friend called me up and said "Happy Birthday" and then proceeded to tell me the other celebs that were also celebrating that day (along with how old they were.) I laughed my head off, and it was a cute touch to her already lovely phone call.
If you need some resources for how to find out this type of information, my list of calendar day sites should give you exactly what you need.

