I'm not sure what you are asking exactly, but I guess you are limited to phone calls, email and regular mail. You don't need to do e-cards - I am sure he would rather have a note, anyway. Be sure to send him photos. A picture is worth 1000 words. Also, send care packages.
You might want to look in to some sort of support group for military wives. It helps to know that other people are in similar situations and would be a nice way to make some friends.
Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?