For those of you with ADHD or difficulty focusing in noisy/distracting environments, a pair of noise cancelling headphones, along with mynoise.net is an absolute blessing (it's free btw).

I really like the distant thunder paired with music, or the "medieval library" sounds as well.

Finally, cleaning up my desk seems to help a lot too, so don't overestimate how a change in your environment (even small ones) can impact your productivity and creativity!