Yes what I do to get over this road block is just play around eith the keys.
Sometimes that does it for me but what really does it for me is to take a popular song and extract one thing from that song like maybe a beat or a tune and then build my own versions of music around it.
I do this and make it sound as unique as possible then when I am finished I usually take the copied tune from it and add my own.
This usually works very well for me and it keeps me being both competitve as well as creative.
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