Similarly, a leak in a fuel line will drain fuel into the bilges, where it will stay because it has nowhere else to go. This is why gas and fuel safety must be taken seriously.
Bilges should be inspected as a matter of course, for either water or fuel. If there is a fuel leak, use a manual bilge pump (not an electric one) to pump out the bilge. A gas sensor is a useful investment and will warn of gas build-up before it becomes critical.
The interior of the boat should always be kept at its best, so keep it clean, dry and mildew-free. Give wooden surfaces an occasional buff and periodically remove any soft furnishings that can be removed, such as curtains to get them cleaned.