Here's a long, thorough look at some of the reasons behind false confessions. Let me reiterate that if people would just refuse to talk to the police at all, a false confession wouldn't be a possibility. That's one of Steakley's Golden Rules.
On the other side of the equation, law enforcement agencies should adopt policies requiring the recording of interrogations whenever possible.
After decades of resistance, even the FBI has finally agreed to start recording interviews.