Listening is one of the best tools in terms of writing a good country music song. Listen to what's on the radio right now. Listen to country music standards from the past that are still well known today. Get a feel for the musical sound of country music, the lyrics and the emotion involved. Once you understand what has worked and is working for other songwriters, you can try to mold your songwriting in a similar fashion. This doesn't mean that you should try to imitate someone else's work note-for-note. You need to retain your originality while still remaining open to influence by the work of other talented individuals.
One of the most important parts of a song is the "hook." This is the part of the song that is repeated (usually in the chorus and title) and tends to stick in your mind. Make the hook simple and memorable. Sometimes humor helps to emphasize a hook, whereas in other songs a concise but profound phrase can stand out. Write the rest of the lyrics in your song to support the hook. Consider the common subject matter of many country music songs. The most common topics include love, longing, and loss. Many songs are crafted to tell a story. Write about something that you care about, have experienced or enjoy. Your personal passion can help to fuel the song. Keep a notebook or voice recorder with you as much as possible so that you can capture ideas as soon as they come to you. Try to make time each day to work on writing these ideas down and expanding on them. Remember, songwriting is an art and a discipline.
If you don't already know how to play an instrument, begin learning as soon as possible. Being able to strum a guitar or play a keyboard or piano can help you immensely in the songwriting process. Just as you need to record lyrical ideas, also use a small recorder to record musical ideas that come to you. If you don't have an instrument nearby or can't play one yet, just hum the tunes that you think might work in a song and record them. You might want to collaborate with other musicians in order to add texture and depth to your song. Common instruments in country music include the guitar (acoustic and electric), bass (electric or acoustic upright), drums, violin (or "fiddle"), mandolin, steel guitar and banjo. Experiment with different melodies and instruments until you find the sound you're looking for.