Edit: in particular those which aren't covered in his books.
Here are some, based mainly on a search for which ones I've linked to before:
Two Types of People (foragers and farmers)
And, since I think he published better writings outside of his blog, here's a longer list of those:
pull the rope sideways: http://www.overcomingbias.com/2019/03/tug-sideways.html
neglected and big: http://www.overcomingbias.com/2017/02/neglected-big-problems.html
crucial considerations: http://www.overcomingbias.com/2017/02/when-do-opinions-converge.html
Others I see on the top voted list that I remember finding valuable include Politics Isn't About Policy, Stories Are Like Religion, Inequality Talk Is About Grabbing, What We Should Study, and Beware Star Academia.
But there are literally 1000+ posts, and I'd like to (as I think I've mention to you ricraz) organise a subset of them into a more readable ordering sometime.