I have shelves on all four walls of my station, on the shelf sets my tip jar, with a hand drawn label that reads TIPS! in big letters. everyday I go in I put like a 20,10,a couple fives in it and depending where on the body I am working and which way the customer is facing depends on which shelf I set it on, lol. on the mirror there is that Japanese sign that states, "Tipping is not a city in China" so when they are getting tattooed the a have a perfect view of the tip jar the entire tattoo, and at the end when they look at their piece they can see the sign. works like a charm, lmao. some people don't know that it is cool to tip a tattoo artist, and you cant just ask for a tip, so you sometimes have to get creative.