well i would research Samhain, so you understand the holiday. communicating with spirits [avoid a Ouija Board please] is a fun past time at this time of year. mostly Samhain is full of divination such, and from what i've studied, a lot of love divination. things like bobbing for apples were once a way to see who would be lucky in love the coming year. at midnight, people would go to lakes, ponds or other still bodies of water, and gaze into the water with a candle or the moon as light. the person you were going to marry was said to appear in the water. same with looking into a mirror, it is said the person will behind you over your shoulder. [left i think]
my coven doesn't do much spell casting, and Samhain is a somber affair where we speak with our departed loved ones, but also make resolutions for the following year. if we do cast any spells, its to help with removing bad habits and/or obstacles. we also do tarot readings for each other.