I made myself a helipad today. Inspired by all of the posts on this thread.
The wife had a couple of old cookie sheets, so I painted a base coat of yellow and then used a stencil cutter to make the H and circle as well as all of the text.
I made one out of a Dora the Explorer game board! You're probably still laughing, but a little paint and you can't tell. The nice part is it folds into quarters making it compact.