I shuffle the Louise Hay affirmation cards and pick one at random, it is always something relevant and something I need to address or focus on.
I then place the card on my mat in front of me and throughout my practice I come back to it - breathing the words in and out.
Sometimes, if it is regarding something that I have been ignoring or burying inside myself, tears and emotions can come up at the end of class and I walk out feeling a tonne lighter!
Or if it's just a great reminder to have gratitude for something in my life already (or something I wish to manifest) it's a really great focus and my class feels like a moving meditation.
Try it some time! Namaste xx