(A) Just because your stove is not in use does not mean you should unplug it. It is unreasonable to unplug all electrical appliances in the house which is why most of them come with an on/off switch
(B) Storing flammable materials in a cool place is good practice because if you store them somewhere where they can heat up, there is the possibility that the heat will ignite them.
(D) Not overloading the outlets is a really good practice, actually, but this generally is something you should watch out for during holidays especially Christmas when you need the use of multiple plugs for Christmas lights etc. Overloading outlets can spark a fire or knock out your power but is not generally a concern in everyday life.
