Kitchen: cleaning inside cabinets and drawers, countertops, stovetop, oven, and the exterior of the fridge. Bathrooms: toilet, sink, bathtub or shower, tiles, and limescale around the faucets.
Windows and balconies: glass on both sides, shutter tracks, and railings. Floors: thorough washing of every room, including corners and under door thresholds.
Small details that are easy to miss: light switches, door handles, light fixtures, and ceiling fans. Practical tip: start with the innermost rooms and work toward the entrance, so you don't dirty an area that's already been cleaned.