Use an old song file to jump start your selection of instruments, listen to other artists and genres to try and learn new things/ get inspiration, have an objective in mind when starting a new track (as in: this song is going to be a really hard dance track with a soothing pad that comes in out of nowhere half way through), look at a picture and try to write a song about it/ how you feel about it, take an old melody you really liked and play it backwards, remix an old song you really liked as a new genre, try out some new samples to see what kinds of sounds or feelings you can get out of them, WRITERS BLOCK IS ALWAYS TEMPORARY. Keep yourself on your toes and realize that music is always ephemeral. You can't get stuck. If I don't like where a track is going after the first hour of work or if it fails to amuse me by the end of the day I delete the file. There's no point in getting hung up on anything when you can learn to compose music like breathing...
PIED3
I recommend trying different genres, and thinking about music as sound rather than structure of form. Just think about noise itself. Make something completely different to your usual that is just interesting in terms of the noise.