if a person is overstaying their welcome, there are several ways to make them leave -  one way is to place a broom upside down behind the door, another way is to tie a towel at the foot of their table, or to place salt at the corner of the wall.

if someone drops a fork, it means a man is coming to visit. if a spoon drops however, it means that a lady will visit the house soon. 

further, if someone drops a fork, and it lands with the tip facing up, it means money is coming their way (itaguaí).

it is bad luck to sweep a house at night (mangaratiba)