Remember my posts: I Spy From My Perch....
We Americans are very careless about handling our waste/trash/garbage. I have not been anywhere in the Eastern US that I didn't find discarded trash that would be useful in a survival situation.
Metal containers that could be used to boil water, rope/line, boards, 5 gal buckets, etc. Then there is all of the natural flora and fauna that will provide shelter, food, warmth, water supplies.
My brain is my most useful survival tool and that is one way that I try to exercise it.
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QMC, USCG (Ret)
The best luck is what you make yourself!