I've blogged about this before, but several people have asked this year so here is how I celebrate Samhain:
For my family Samhain is a three day holiday which begins on October 31st. Although I tend to favor the idea that originally the holiday was agrarian based and timed depending on environmental signals which would have brought the herds in from summer pastures, I chose a set time for convenience and so my children could look forward to the date. Since generally the four fire festivals are dated on the kalends of the month, which would make Samhain on November 1st, I start my celebration the day before and end it the day after that date.
The first day of the holiday is dedicated to the daoine sidhe and wandering ghosts. Since we also celebrate secular Halloween with trick or treating my children give the sidhe a tithe of candy from their take at the end of the night. Porridge is offered as well, left out near the woods and I tell the kids fairy-stories. After the kids go to bed I also re-swear my oath to my Druid Order because this is the anniversary of my dedication as a Druid in White Oak.
The second day is dedicated to the Gods. Usually an Morrighan and an Dagda, but this year I am honoring Macha and Nuada instead. As part of this I tell my children stories about the Gods or spirits and things that happened on Samhain, of which there are many to choose from in Irish myth. This year I'm planning on talking about the second battle of Moytura and the Tuatha De overcoming the Fomorians. As part of my ritual I extinguish all the candles on my altar and relight them to symbolically re-enact the Samhain fire lighting at Tlachtga. We have a small ritual feast as well, of pork and apples with seasonal vegetables, some of which is offered to the Gods, spirits, and ancestors.
The third and final day is for the ancestors. I light candles on my ancestor altar and tell my children stories about the family members who have passed from this life. We set an extra place at dinner and leave out a plate of food for the dead. I also often talk to my children about the turning of the seasons and the approach of winter now. We take our Halloween pumpkins and offer them to the woods to feed the deer and other wildlife.