Some people send or bring flowers. Some families prefer donations to flowers.

There is often a groudswell of help and support right after a death that tapers off just when the numbing effect of shock starts to give way--when the bereaved stop saying, "It hasn't hit me yet." Support in the coming weeks/months is equally crucial, if not more so. If you are close to the bereaved, you might help them sort and reply to correspondents, or be there for them as they go through the possessions of the deceased, or call various companies who need to be notified (anyone who sends the deceased mail, pretty much).