I used to love to go to card shops and browse. I'd spend hours looking for just the right message. I don't have the time anymore and get discouraged after awhile when I can't find the right card. For that reason I've decided to make my own. After you buy a few supplies, it takes less time that buying one and it sure is cheaper.
Download the "Thinking of You" thought bubble here and print.
Get a piece of #6 plastic which is found on most take out containers. I found this one at my grocery store in the aluminum pan section. You'll know it is a #6 (the only kind that works) because there is a tiny triangle in a corner with the number six inside.
Sand the plastic and place it over your printed paper.
Glue your bubble onto a card blank with a clear drying glue such as Goop and add a message inside.
This is a perfect card for almost all occasions.