Replace fire extinguishers
Replace fire extinguishers to prepare for the next Tenant/Tenant-Buyer.
They have limited lifespans and it is probably cheaper to just buy new ones than to have them serviced.
Service AC and furnance
Have AC and furnace serviced preparing for next Tenant/Tenant-Buyer.
Change furnace filter
Your HVAC person may replace the furnace filter for you, but they may not. So, make sure you have a new furnace filter installed.
Check for leaks
Check for leaks under all sinks and near all water sources. Fix them as required.
Schedule carpets to be cleaned
Call your carpet cleaner and schedule a time for them to clean the carpets right after the current tenant vacates the property.