Check out an alternative genre
Understandably, songwriters tend to write in the style of what they consume the most – it's only natural. And, granted, it's not simple to write in a mode that you don't know much about. Focus on a genre you haven't tried employed in, but are familiar with. If most of your interest is folk, you could attempt rewriting a song you've completed in a rock style, or which makes it into an electric piece. Taking things a little from the comfortable sofa in this manner can assist you to branch out without having to be totally lost.
Write someone else's story
Sometimes you could find yourself on the listening end for a pal, and while you may not have lived the exact same experiences, you probably (hopefully) feel sympathetic to his or her plight. Instead of your own thoughts, try writing theirs. It may explain to you a fresh perspective, but may also shed some light on the situation for each other as well!
Write with an alternative instrument
May very well not be great at your secondary instrument, but that's the point – once you don't know very well what you're doing, sometimes you wind up doing creative things because you're not playing from muscle memory. This might be a good opportunity to look for help from the musical friend who is able to explain to you some new things on a guitar that you don't normally have access to.
Can't get ahold of another instrument? Use your voice! Creating melodies, harmonies, or just messing around with syllables and sounds could be a great begin to a fresh piece.
Write from the opposite perspective
You can find always at the very least two sides to every story. If you tend to write from your own personal experiences, see when you can put yourself in the other person's shoes, because it is going to be the harder perspective to understand and articulate. This isn't only a workout in creativity, but in addition an exercise in empathy!
Listen to music that's out of the ordinary for you
Put something for you that wouldn't typically listen to. This might be a friend's suggestion, or even better, go see the live show! Try to be objective and listen analytically, and you might hear something you like that you wouldn't have considered otherwise. In this way, you get the chance to consider creatively, and at once, discover new music!
Give collaboration an attempt
One of the absolute best methods to escape your songwriting comfort zone is by co-writing. Finding a songwriter whose strengths and weaknesses complement your own personal can lead to an enduring partnership, and great music, too.