To clean a microwave: take a clean cloth, make it soaking wet, place it in the microwave and run it for 30 seconds. The steam will dislodge all the grease and grime. Just wipe with a clean dry cloth after.
Use Magic Eraser on scuff marks in a white tub.
Use old stiff toothbrushes and Barkeeper’s Friend to remove build up around faucets.
Use pumice stone stick to remove hard water build up inside the toilet bowl.
Use Barkeeper’s Friend (gel) to remove hard water build up on shower glass.
Use degreaser inside the standard shower cabin. This gets rid of body oils and cleaning products’ oil build up.
To do mirrors streak-free: take a clean dish sponge, soaked in hot water and Dawn. Liberally apply all over the mirror. Wipe down with clean, wet microfiber cloth top down in a zigzag pattern, pushing everything down (as opposed to circular motion). Works on window glass too.
To do laminate floors streak-free. Use cleaning alcohol spray and polish with dry microfiber cloth.
Before mopping floors - vacuum them first, especially the corners.
Use dryer sheets on freshly dusted black surfaces. They remove static and repel dust particles.
Vacuum window railings with a tube attachment - there are always dead bugs and debris there.
To check if your counters are clean, use your bare hand and touch the surface to see if you feel any crumbs.
To achieve a really amazing result cleaning - be prepared to spend 3–4 times the hours you normally do. That's what it takes.