Freud is still regarded as the father of modern psychology, perhaps because he was the first to actually sit down with his patients and take them seriously.
Here's an article that tells the story in detail: http://www.theatlantic.com/magazine/archive/1984/02/freud-an...
I think that calling his brain science "junk" however (which I'm not accusing you of, just repeating your characterization, which is definitely a position some people hold) is a bit uncharitable, partly because in retrospect all of the nascent "brain science" from that time was pretty junky, but also because he was aware and often explicit that his writings were highly theoretical and speculative, e.g. his writings on the death drive, and his writings on politics and civilization were often cases of him just following lines of thought to see where they went. I think some people take Freud too seriously here (though he also sometimes took himself too seriously).
Ah, a primitive emotion - fear - protecting you from the psychosomatic response (nausea) emanating from the id, the reptilian section responsible for protecting you from primal dangers (attack/rape).
That was a lame attempt to be meta, but I think one of his junk theories was the oedipus complex[1], the theory that children sexually lust for a parent. I think that one has mainly been discounted, but as another poster said, Freud sort of blew the lid off all the rapey things that were going on (people came to him with "hysteria", which was probably PTSD and anxiety, he asked them about their history, most of them were raped/molested/traumatized, and decided these rape victims needed a clean, palatable theoretical explanation instead of condemning their attackers).
Not all of his stuff was junk, though. His drive-defense model is still partially in use today (just google psychological defenses, see the list of them on wikipedia). What bugs me about Freud critics is they appear to bash him as if he's out there now, still practicing. He came up with this stuff 100 years ago, and just like pioneering medical doctors from 100 years ago (who aren't criticized even a fraction of Freud), his research is obsolete and has been replaced by more refined and sophisticated models. I dont know why so many people wont accept that: we dont remove an appendix the way we did in 1912, just as we dont treat depression the way Freud did. And we dont condemn 1912's surgeons as fools for not knowing what we know today.
Anyone know of a good guide? And, since it's Freud, one that won't turn my stomach?