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I always have considered myself tech savy, but how many doctors may have decent experience in networking IT technology? Each time AC network connection error message pops up, I have panic attack as I do not hire IT person. But that still is fine because now I am quite good in maintaining my own network and can troubleshoot most commonly occuring issues without downtime.

Using proper equipment often helps with networking issues. Using all wired workstations, gigabit switches, and things like that keeps things running smoothly. You shouldn't be having issues if the network is set up properly.
I wrote a little post called Networking Fundamentals. Check it out.
http://amazingcharts.com/ub/ubbthreads.php/topics/45875/Networking_Fundamentals#Post45875