Take an equal number of white and dark chocolate buttons, put them in a cup, then ask a question to which the answer is either yes or no. Close your eyes and pick a chocolate button randomly out of the cup. If it is white chocolate, the answer is yes; if it is dark chocolate, the answer is no.
When you've got your answer, eat the chocolate.
This is an ideal divination to do at the time of the equinox, when the day and night are of equal length and the year is in balance. It also makes a fun party game at any time of the year.