Stained Bath
Combine equal amounts of cream of tartar and baking soda with enough lemon juice to make a paste. Rub the mixture into the stain. After a half hour rinse thoroughly with water.
Stuck Sliding Windows
Grease the skids using a little silicone spray lubricant (available from hardware stores). Spray it onto a rag, then wipe along the tracks.
Slamming Door
Soften the slam of a door by fixing a few pieces of peel-and-stick foam weather stripping around the doorstop. Or get a wide rubber band and wrap it around the doorknobs on both sides, stretching it across the edge of the door.
Hard-To-Remove Lightbulb
Press the centre of a 30cm strip of duct tape onto the middle of the bulb. Fold each loose end in half so it sticks onto itself. Give it an anti-clockwise twist to loosen the bulb.
Flattened Down Cushions
Put them outside in the sun for a few hours, flipping them halfway through. (Be careful leaving them out too long as it may fade the fabric.) The sun will help evaporate the moisture that gets into the filling over time and the cushions should plump up nicely.