this is seen as the start of a new year, the veil between the human and spirit realm is at its thinnest. speaking with spirits and remembering those who have died is a well known tradition, but divination for the following year is also practiced. love divination primarily, but there are old games and things people would do to find out if the new year held, sickness, health, love, loss, wealth, children, and so on.
on a side note if you want to make Halloween more 'interesting' perhaps put on a scary movie. try studying about this time of year and make your own celebration, but if you are simply bored and want to kill time, try skrying or some other divination.