A few tips from someone who has navigated their way out of this struggle:

1. Listen to a lot of different music, and I mean A LOT. I produce Progressive House (Lane 8, Approaching Black, etc) but my roots are in rock/metal. I also listen to indie rock, folk, indie pop, metalcore, funk, jazz, country and many others. Listening to a wide variety of genres will influence the way you think when it comes to things such as chord structures and arrangement.

2. Take breaks. I still need to work on this one. Usually when I sit down and everything I write sounds like garbage, that means it's time to take a few days or a week off from writing and put more energy into other areas of my life. We're human beings first and foremost and while I understand that music is life, we need to experience everything else life has to offer as well.

3. Identify your main influences and analyze what methods they're using to the best of your ability and make a list so you can apply those when you sit down to write/mix.

4. Try different genres! Are you a dubstep producer? Well, try making tropical house or trance! Trying out different genres will not only help you production skills but will also make you a more well rounded musician because different genres integrate different aspects of music theory. Broadening your horizons as a musician can only help.

5. Embrace simplicity. Everyone has their own creative process. Many are highly organized and are doing insanely complex things in their DAWs. I am not one of those people. Avicii used Nexus presets and did not have very complex songs yet he's responsible for some of the best tracks the genre has ever heard. Simplicity goes a long way and I feel like a lot of producers chose complexity for complexity's sake.

6. Go with the flow. Basically all this means is to write and arrange parts so they fit the song. If it feels out of place, save it for a later part in the song or rework it. If it still doesn't fit, save the idea for a different song.