Apart from Acrobat Help, there are two articles here on this web site: http://www.acrobatusers.com/tutorials/2007/digging_into_preflight/ http://www.acrobatusers.com/tutorials/2007/preflight_tools/
and a video here: http://www.adobe.com/designcenter/video_workshop?id=vid0110
If you have specific questions because you want to find our something and don't know how to look for it, please ask.
Otherwise a training course with a pro might be worth the money if you need to get deeper into it and will use it often in your job.
Apart from Acrobat Help, there are two articles here on this web site: http://www.acrobatusers.com/tutorials/2007/digging_into_preflight/
http://www.acrobatusers.com/tutorials/2007/preflight_tools/
and a video here:
http://www.adobe.com/designcenter/video_workshop?id=vid0110
If you have specific questions because you want to find our something and don't know how to look for it, please ask.
Otherwise a training course with a pro might be worth the money if you need to get deeper into it and will use it often in your job.
Regards
Sebastian