We know ,but we don't do it due to various factors ,at the end we loose heavily .What are they .

Doors and cupboards - - > Put oil at joints and locks for lubrication > Close the doors ,Windows and cupboards by licking all the locks ,padlock ,books both the sides to prevent buckling and bent of wood. > Keep air right of unused chemicals ,paints ,adhesive ,thinner from evaporation and strength .Preserve properly > To buy only right / branded items that are required and right quantity > Develop children in cost conscious on every thing, nothing comes free, every thing costs money, energy and time Very soon we will be short of skilled Labour for all segments . Beware !! Going to start writing on such things, my observation today and learning curve from carpenter. Sharing ,may be useful .