Answer:
1. Close the Windows.
2. Put on Earplugs.
3. Improve your Insulation.
4. Invest in Noise-Canceling Headphones.
5. Do Wall-to-Wall Carpeting.
6. Install a Fence.
7. Be Creative with the Office or House Layout.
8. Invest in Noise-Friendly Flooring.
Note: this is only applicable to houses and offices.