There are probably hundreds of publications on the subject. (Booch comes to mind.) Search the web for OOD (Object Oriented Design) and you will find lot's of it.
The way I do it is a mix of reading many books about several methods mixed up with (too long a) time using it in real life.
"I don't mean to sound like an idiot..."
Not asking makes an idiot. ;-) The only stupid question is the question never asked. (OTOH, chosing the right fora for a question may be an art in it self.)
Everything went worng, just as foreseen.