[header] How to write a catchy song [title] Choose your subject matter. [step] Begin by asking: what do you feel inspired to write a song about? The most popular songs often have emotional content that is relatable and that resonates with the listeners' own experiences. [title] Write an arresting first line. 
[step] The first line is important because it introduces the subject you are writing about and establishes the mood of the song. [substeps] It can also be an effective way of grabbing listeners' attention from the very first instance.