I'm half-way into "Simple Heuristics That Make Us Smart", and it's very revelatory on the subject. Turns out with the "recognition heuristic" alone you can go a

I'm half-way into "Simple Heuristics That Make Us Smart", and it's very revelatory on the subject. Turns out with the "recognition heuristic" alone you can go about halfway. The rest goes again halfway with another just a bit more complex heuristic. Also interesting is that very simple heuristics tend to be about as good or more as very complicated algorithms, and sensibly more robust. I found an abstract (http://www-abc.mpib-berlin.mpg.de/users/ptodd/SimpleHeuristics.BBS/ http://www-abc.mpib-berlin.mpg.de/users/ptodd/SimpleHeuristi...) but it's a bit dry. The actual book is a lot more readable.