I'm not sure if i have mentioned this before, but this is how i make writing post cards SUPER EASY!
I take my pre-printed address labels for the return address
THEN i also take pre-printed address lables of all the people i am sending them to! That way i don't have to write them all out! I just STICK , STICK and send! I also buy the postcard stamps at the post office, keep it all in a plastic envelope from TARGET (.50) and Throw it in the bag we take to the parks! SUPER EASY!!