I wrote a regular column for Live Sound International magazine for a few years. Some of the articles now reside on the Study Hall pages of ProSoundWeb.com. Here are the links:
The INcidental Contractor: Go in with eyes wide open
Expanding to provide A/V installation services: important factors to keep in mind
The decision to repair or replace sound reinforcement gear
For the Record: the past tells us much about the future of live recording
What's the delay? The effects of weather conditions on sound
Size Matters: Observations on loudspeaker directivity