Mystical aids: Candles, palms.

I find it interesting that in order to focus on the unity and diversity of the divine manifestations of God on earth, each linked with a certain color according to the Zohar, the Zoharic sages for meditative techniques would stare at the interplay of colors in a candle, or rub their palms against their closed eyes and watch the the interplay of colors inside their eyeballs. It sounds cheesy and slightly ridiculous, but these exercises would change their consciousness or maintain a changed consciousness when they interacted with the world.