Light a purple candle. You can also burn some jasmine or rose incense if you wish.

Say this incantation:

"Oh Goddess Brigit,
bright lady of the flame,
blessed mother of the poets.
Lend me such insight, wisdom, and divine inspiration
that the words may flow to me
and that I may may craft them beautifully
so that they spin a tapestry of magic
In the hearts of all who hear them.
So mote it be!"

Leave the candle to burn itself out. when it does, put it wherever you keep rituals remnants and give thanks to the Goddess for her gift.