Worry is thoughts, images and emotions of a negative nature in which mental attempts are made^[vague] to avoid anticipated potential threats. As an emotion it is experienced as anxiety or concern about a real or imagined issue, usually personal issues such as health or finances or broader ones such as environmental pollution and social or technological change. Most people experience short-lived periods of worry in their lives without incident; indeed, a moderate amount of worrying may even have positive effects, if it prompts people to take precautions (e.g., fastening their seat belt or buying fire insurance) or avoid risky behaviours (e.g., angering dangerous animals, or binge drinking).

Excessive worry is the main component of generalized anxiety disorder.

One theory of anxiety by Liebert and Morris in 1967 suggests that anxiety consists of two components; worry and emotionality. Emotionality refers to physiological symptoms such as sweating, increased heartbeat and raised blood pressure.^{[citation needed]} Worry refers to negative self-talk that often distracts the mind from focusing on solutions to the problem at hand. For example, when students become anxious during a test, they may repeatedly tell themselves they are going to fail, or they cannot remember the material, or that their teacher will become angry with them if they perform poorly. This thinking interferes with focusing on the test as the speech areas of the brain that are needed to complete test questions are being used for worrying.^{[citation needed]}

Dwayne Michael Carter, Jr. (born September 27, 1982), better known by his stage name Lil Wayne, is an American rapper. At the age of nine, Lil Wayne joined Cash Money Records as the youngest member of the label, and half of the duo, The B.G.'z, with B.G.. In 1997, Lil Wayne joined the group Hot Boys, which also included rappers Juvenile, B.G., and Young Turk. Hot Boys debuted with Get It How U Live! that year. Lil Wayne gained most of his success with the group's major selling album Guerrilla Warfare, released in 1999. Also in 1999, Lil Wayne released his Platinum debut album Tha Block Is Hot, selling over one million copies in the U.S.

Although his next two albums Lights Out (2000) and 500 Degreez (2002) were not as successful (only reaching Gold status), Lil Wayne reached higher popularity in 2004 with Tha Carter, which included the single "Go D.J." Wayne also appeared on the Destiny's Child top ten single "Soldier" that year. In 2005, the sequel to Tha Carter, Tha Carter II, was released. In 2006 and 2007, Lil Wayne released several mixtapes and appeared on several popular rap and R&B singles. His most successful album, Tha Carter III, was released in 2008 and sold over 1 million copies in the U.S. its first week of release. It included the number-one single "Lollipop" featuring Static Major. It also includes the singles "A Milli" and "Got Money" featuring T-Pain and won the Grammy Award for Best Rap Album.

Troy Black (born 1983) is an Australian Martial arts Coach.

Black was recruited by the Australian Institute of Sport at age eight, and went on to be one of the most successful, influential and charismatic figures in Australian martial arts, appearing in magazines, TV shows and the "Life: Be In It' advertisement series.

At the age of eighteen, Black represented South Africa in the International Karate Championships, becoming the youngest person ever to win a first place in any senior division.

He is currently a coach with the Australian National Martial Arts team, and an editor of Blitz Magazine.

Robert "Bobby" McFerrin, Jr. (born March 11, 1950) is a virtuoso American vocalist and conductor. He is best known for his 1988 hit song "Don't Worry, Be Happy". He is a ten-time Grammy Award winner. He is well known for his unique vocal techniques and singing styles.

Bobby McFerrin was born in Manhattan, New York City, the son of operatic baritone Robert McFerrin and singer Sara Copper. Robert Sr. was the first African American to be a regular with New York's Metropolitan Opera. Sara is a former soloist with regional opera companies and in Broadway shows, and is a professor emeritus of music at Fullerton College in Fullerton, California.

Bobby McFerrin married Debbie Green in 1975. They have three children.

McFerrin's song "Don't Worry, Be Happy" was a No. 1 U.S. pop hit in 1988 and won Song of the Year and Record of the Year honors. McFerrin has also worked in collaboration with instrumental performers, including pianists Chick Corea, Herbie Hancock, and Joe Zawinul, drummer Tony Williams, and cellist Yo-Yo Ma.

Dale Breckenridge Carnegie (originally Carnagey until 1922 and possibly somewhat later) (November 24, 1888 – November 1, 1955) was an American writer, lecturer, and the developer of famous courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills. Born into poverty on a farm in Missouri, he was the author of How to Win Friends and Influence People (1936), a massive bestseller that remains popular today. He also wrote How to Stop Worrying and Start Living (1948), Lincoln the Unknown (1932), and several other books.

One of the core ideas in his books is that it is possible to change other people's behavior by changing one's reaction to them.

Dale Carnegie was born in 1888 in Maryville, Missouri, Carnegie was a poor farmer's boy, the second son of James William Carnagey (b. Indiana, February 1852 – living 1910) and wife Amanda Elizabeth Harbison (b. Missouri, February 1858 – living 1910). His family moved to Belton, Missouri when he was a small child. In his teens, though still having to get up at 4 a.m. every day to milk his parents' cows, he managed to obtain an education at the State Teacher's College in Warrensburg. His first job after college was selling correspondence courses to ranchers; then he moved on to selling bacon, soap and lard for Armour & Company. He was successful to the point of making his sales territory of South Omaha, Nebraska, the national leader for the firm.