Disclaimer: I am a low season, shoestring budget traveler, LOL
Many hotels offer free breakfast, or incentives like stay 6 nights get one free, usually in low season
Scope out hotel rates online, then walk in with cash and make an offer (if the thought of doing that doesn't freak you out.)
I bring a small hot pot to boil water for tea, porridge, etc.
I bring a big bag of tropical trail mix and small ziplock bags to carry some to the beach or wherever
have brought fishing line and hooks and enjoyed the catch of the day
I keep it local - no chain or corporate type of business gets my cash (except the airline)
Stuff like sunscreen and "American" style snacks can be very expensive so don't forget to pack them.