What did researchers at University College London determine is the best way to avoid losing at Rock-Paper-Scissors?

Answer: By playing with your eyes closed.

ScienceDaily writes, "Players of the game rock paper scissors subconsciously copy each other's hand shapes, significantly increasing the chance of the game ending in a draw, according to new research." 

In matches where one player was blindfolded, "the number of games ending in draws was significantly higher" than those between two sighted players.