This article about a chess player being banned for using electronic equipment to cheat gives you something new to watch for at the euchre table. According to the article the player was wearing a hat in which he stitched a Bluetooth headphone. His confederates (that's what hustlers call their accomplices) would work out the best move on a computer and relay back to him what he sould do. Ingenious. And it would've worked if not for a random check. Sucker. Now he's been banned for 10 years from competitive chess.
So, how might a euchre player use this con? Simple. He wears a set of headphones like he's a bigtime poker player or he's expecting an important phone call, non-euchre related of course. His confederate stands behind the Left hand opponent and peeks at her cards. He then relays important information about the opponent's hand so our cheat will know what to order.
1. Don't fall for the old "headphone in the ear" trick. Require your opponent's ears to be unobstructed. No hats either!
2. Don't let anyone see your cards. Hold your cards as if every eye in the place is trying to see what you have. Look at your cards, memorize your euchre hand them using these tips, and put them down.
It is hard enough to win at euchre without having to overcome cheaters. As you play in those New Year's Euchre Tournaments, watch yourself out there.