How regularly do you polish your dining room table? Do you just purify it down at night? Or do you...

Do you just purify it down at night? Or do you polish it weekly? Or in recent times when it needs polishing? Do you usually hold it covered with a tablecloth to protect it?
Answers:    I enjoy two dining tables, one is wood and the other is chalice. I live in an arid semi-desert climate and the wood desires to be moisturized a little more commonly here, so I wax it about every 3 months and use Howard's Restore A Finish on it around once a year. My glass table other has any a runner, scarf or table cloth on it but because it is glass and shows finger prints glibly I clean it after every use.
depends on what your table is timber,glass or plastic