wifi info
need info for troubleshooting and best practices for multiple AP for n,g and b; and all the advanced options most people leave at default or auto.
There's a question in there...?
Yeah "need info".

I don't change many settings other than changing the channel to a certain channel instead of Auto. Automatic channel selection never works well
troubleshooting... uh idk each install will be unique in its own way
if using a repeater make sure you have at least 25% signal on the original AP.
use static ip addresses for all network ap devices
According to ARFCOM, the only wifi security you need is to change your SSID to "FBI Stakeout Van 4" or something along those lines. It will scare your neighbors so they won't try to access your connection. Similiar to racking a pump shotgun.
Wiley books and CBT Nuggets can be decent reference material on the subject of Wireless Networks, there are literally dozens of them.
Apps like WiFi Analyzer are great little tools too.
Of course the easiest way is to figure out just exactly what you want to know a google it.