Never get involved in a land war in Asia - and never let Socrates ask you deceptively simple questions about good vs. evil.
I think one of the places that Gorgias "stumbled" was his definition of oratory. He seems to equate crafts as mere manual labor. He thinks that craftwork is something done strictly by hand, oratory is done with your brain, and this fails to take into account the thought that goes into painting or other artisan-type activity. Socrates gets Gorgias to agree that oratory isn't concerned with all speeches, but it does make people capable of speaking - and wise in what they are speaking about (p. 795). That last part - oratory making someone knowledgeable about the topic - is an opening that Socrates exploits. The 1950s-era composition scholars changed that definition, I think, though the definition may have changed before that, I will stay tuned in Modern to find out for sure.
I also felt the dialog got bogged down into good vs evil (which is worse, doing injustice or suffering injustice?), and if I learned anything in postmodern, it was that there are no absolutes.