I am a bit of a fan of the tarot. A technique I applied was to utilise the cards to represent a story. To this end I identified the main characters in the Gwion / Taliesin tale and identified cards I felt represented some of the transitions in that tale (I used the Druidcraft Tarot). This laid before me a whole set of symbols that were attached to those characters and events... and from this came a meditation on some aspects of that tale (and even a song).
A really well crafted seminar Creirwy, thanks for sharing!