I am a multi-instrumentalist, but most of my music is written on the piano. It’s such a versatile and rich instrument that it’s by far my favorite tool for composing. That said, in the long run, it’s easy to find yourself falling into a pattern, using the same kind of chord progressions, the same kind of playing, or the same keys over and over. However, when I try to write music using, say, the guitar or violin – completely different melodies, chord progressions and emotions are automatically expressed.
Using a new instrument usually makes me play in different ways, feeling inspired, and coming up with fresh and different material. It is something I definitely can recommend, as just switching the instrument I’m writing on quickly eliminates any creative blocks I might be facing. If you are a guitarist, put down your guitar and sit by the piano. If you are a pianist, try to just sing your melodies or use a guitar. Try to turn to a secondary instrument sometimes, and you will often find yourself writing in a whole different way.