By lowering TX power on interfering radios, By Using better antennas Such as Ultra High Performance, which have narrower beam widths and better frequency discrimination, By alternating Polarity on interfering radios, Having one on Horizontal and the other on Vertical. By proper RF engineering, Keeping all the MW radios at one location TX High or TX Low, I know this isn't always possible which is why the use of Ultra High Performance Antenna's is important.