Monthly home maintenance includes testing detectors, checking for leaks, running unused water, testing GFCI outlets, inspecting for pests, and checking fire extinguishers. Seasonal tasks cover roof and attic inspections, plumbing and HVAC checks, gutter cleaning, exterior repairs, lawn care, septic system maintenance, and storm preparedness. Heating and cooling systems require servicing before seasonal changes, and winterization involves insulating pipes and installing storm windows.