A few weeks ago I walked up to the Cathedral of St. John the Divine, which is a spectacular thing to see if you're ever in New York. It's a massive Gothic revival church (and still not finished, though they've been working on it since 1892). But what fascinated me most were the candles:
If you light a candle for someone at St. John the Divine, you don't just light it anonymously and slip your money in the box (though you could if you wanted); you can take a Sharpie and write a message on the outside for the person you're praying for, or what you're thankful for. The place draws a lot of tourists, so the messages are from all different countries. (See here "Dear Mum ..." and "Danke fur NYC.")
My mother likes to light a candle before she goes to bed at night, because she says the flickering soothes her to sleep; since she told me that, I've learned that candle meditation has been embraced by everybody from the yogis to the Celts. As usual, Mama was on to something.
Just make sure you remember to extinguish the flame before you lose consciousness!