You’re Stranded on a Desert Island (not dessert)

as specifics weren't given, assumptions were made...

island similar to cast away (tom hanks) and castaway (oliver reed), not the far side with a single palm tree

weather tropical with periodic rain (tarp collection), exposure limited to sunburn, breezes to keep flying insects at bay

flora/fauna typical of pacific islands, lots of fish, small land animals, tropical plant edibles

primitive shelter = easy (knife)
primitive fire = easy
primitive cordage = hard (rope)

mirror signaling only in daylight and requires aiming skill; day or night, flare means only one thing

make and wear primitive footgear; mind your step, eyes, and hands; don't travel at night

hopefully someone observant passes by