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]}

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.

The Everly Brothers, Don and Phil; born Isaac Donald "Don" Everly on February 1, 1937 and Phillip "Phil" Everly on January 19, 1939, are country-influenced rock and roll performers, known for steel-string guitar playing and close harmony singing. The group was elected to the Rock & Roll Hall of Fame in 1986.

Don and Phil Everly are both guitarists and use vocal harmony mostly based on parallel thirds. With this, each line can often stand on its own as a melody line. This is in contrast to classic harmony lines which, while working well alongside the melody, are not as melodic by themselves.

For most of their recordings, Don sings the lower harmony part, while Phil takes the higher. One exception is on "Devoted To You". Although Don is still low and Phil is high, they switch lead and harmony back and forth. Don almost always sings any lines that are sung solo (for example, the verses of "Bye Bye Love".) Among the exceptions to this rule is the Everlys' 1965 single "It's All Over", where Phil sings the song's solo lines.

Mark Freuder Knopfler, OBE (born 12 August 1949) is a Scottish-born British guitarist, singer, songwriter, record producer and film score composer. He is best known as the lead guitarist, vocalist, and songwriter for the British rock band Dire Straits, which he co-founded in 1977. After Dire Straits disbanded in 1995, Knopfler went on to record and produce six solo albums, including Golden Heart (1996), Sailing to Philadelphia (2000), and Get Lucky (2009). He has composed and produced film scores for eight films, including Local Hero (1983), Cal (1984), and The Princess Bride (1987). In addition to his work with Dire Straits and as a solo artist and composer, Knopfler has recorded and performed with many prominent musical artists, including Phil Lynott, Chet Atkins, The Chieftains, Eric Clapton, Bob Dylan, Emmylou Harris, Jools Holland, Sonny Landreth, and Van Morrison. He has produced albums for Tina Turner, Bob Dylan, and Randy Newman.

Knopfler is one of the most respected fingerstyle guitarists of the modern rock era, and was ranked 27th on Rolling Stone magazine's list of 100 Greatest Guitarists of All Time. Knopfler and Dire Straits have sold in excess of 120 million albums to date. A four-time Grammy Award winner, Knopfler is the recipient of the Edison Award and the Steiger Award, and holds three honorary doctorate degrees in music from universities in the United Kingdom.

Chester Burton Atkins (June 20, 1924 – June 30, 2001), known as Chet Atkins, was an American guitarist and record producer who, along with Owen Bradley, created the smoother country music style known as the Nashville sound, which expanded country's appeal to adult pop music fans as well.

Atkins's picking style, inspired by Merle Travis, Django Reinhardt, George Barnes and Les Paul, brought him admirers within and outside the country scene, both in the United States and internationally. Atkins produced records for The Browns, Porter Wagoner, Norma Jean, Dolly Parton, Dottie West, Perry Como, Elvis Presley, the Everly Brothers, Eddy Arnold, Don Gibson, Jim Reeves, Jerry Reed, Skeeter Davis, Waylon Jennings and many others.

Among many honors, Atkins received 14 Grammy Awards as well as the Grammy Lifetime Achievement Award, nine Country Music Association Instrumentalist of the Year awards, and was inducted into the Country Music Hall of Fame and Museum.