. Construct shelter - The best type of shelter is an underground shelter
You don't have much to do on this island, so use your time by digging a hole in the ground
Make a tunnel, about 10 feet long and build your shelter at the end of the tunnel
Coverit with leaves and hope it won't rain and make your tunnel collapse
You can also use wood and tarp, hmmmmm
Now that I think about it, use the wood and tarp =]
Last resort, call these guys