Don’t use “like” (similar to) when you mean “such as” (the real deal):

Incorrect: "This conference always features well-known speakers like Oprah Winfrey, Tony Robbins and Arnold Schwarzenegger.” (Well, which is it? The actual Oprah, Tony and Ah-nuld, or a trio of impersonators?)

Correct: “This conference always features well-known speakers such as Oprah Winfrey, Tony Robbins and Arnold Schwarzenegger.”

Also correct, if a bit outdated: “Be like Mike.”