How do you know what "goes"?
Well, in art there are no rules. Yes, there certainly are things that work and don't work.
I can do a custom piece to fit your space with color and scale... but if my art isn't your cup of tea:
Here are a few helpful sites to get you going in the direction to finding perfect art that has meaning:
https://fineartamerica.com/blogs/selecting-the-right-art-for-your-home.html
http://www.huffingtonpost.com/dering-hall/8-must-read-tips-before-b_b_6465636.html
http://www.griffingalleryfineart.com
I will add to this list over time.