Use outdoor lights with a photocell unit or a timer so they will turn off during the day.
When working near a sink or bathtub always put the plug in. This will prevent any dropped screws from entering the hole.
If you're selling a house, consider leaving behind relevant warranty information, operating instructions, and any maintenance tips that might be helpful to the new owners. If you're buying a home, request that information, along with a list of plumbers, electricians, pool companies, and so on that have provided reliable service in the past.