• Owner's manuals and warranties for appliances left in the house.
• Garage door opener.
• Extra sets of house keys.
• A list of local service providers — the best dry cleaner, yard service, plumber, etc.
• Code to the security alarm and phone number of the monitoring service if not discontinued.
• As a courtesy, you could provide numbers to the local utility companies.
• If it's a condo, leave information on how to contact the condo board.