Check here: http://en.wiki.eagle.ru/wiki/DCS:_A10C_Training_Supplements
You will find 3 really good JTAC guides under (drum roll...) Guides :smilewink:
And there's these 4 videos: http://www.youtube.com/user/SpareTimePilot?feature=mhum#p/c/24181A658668FAC0
Otherwise GGTharos is right, stay clear of target area whilst looking for targets, use AP on set Altitude, with a fair bank... This will keep you going in circles whilst you look for targets. Check RWR for potential hazards. If you miss JTAC info you can always re-request it...