The memorial prayer of Yizkor is said four times a year during Temple services. It is said on Yom Kippur, Shemini Atzereth, Pesach and Shavuoth. It is not said during the first year of mourning.
Belongings of the Departed
Articles belonging to the dead such as a wig or artificial teeth (considered a part of one's body) are not used by others; these should be buried with the person who died.
Ornaments such as rings, pins and clothes are used by the living.
It is a Mitzvah, a worthy deed, to pay a condolence call after the funeral. By our visit we show the mourners that we do not forget them; we illustrate to them that we understand their sorrow and we share it with them.
Levity and laughter are obviously out of place. Rather, the conversation should center around the personality and character of the departed. In this manner, the departed is memorialized.