Focus on matching corners before solving one side of the cube.
Yell words at pantomimer until you guess the charade.
Dance to the rhythm of the music and not just the arrows on the screen.
Waldo's by the blue car near the church.
The two vertical lines are identical and are of equal length. The fact it's called an "optical illusion" should have been the giveaway.
In trivia board games, the answer to the geography question is always "Antarctica"; Entertainment is always "Liberace"; Science & Nature, "photosynthesis"; History, "The Alamo"; Arts & Literature, "Jane Eyre"; and Sports & Leisure, "'86s Mets."