Nice post! You didn't explicitly ask for criticism, but I'm going to give some anyway:

I think the standard font-size on LessWrong is smaller. Most people would prefer it if you used that.

I think there's definitely interest on LessWrong for improving intuition, but I would frame it as "Training intuition to make its judgements more rational" rather than (as your post leans towards) "Forget rationality and harness our natural biases!". This is mostly just a terminological difference.

The System 1/System 2 distinction is really between System 1 being (fast, intuitive, subconscious) and System 2 being (slow, deliberative, conscious). Around these parts, the word "rationality" tends to be used to mean something like "succeeding by using any and all means". Under this definition, rationality can use both System 2 and System 1 type thinking. Thus I believe your post could be improved by taking the sentences where intuition is being contrasted with "rationality" and replacing the word "rationality" with something like "deliberate thought" or "System 2".

As I say above, this is really just a terminological difference, but I think that making it will clarify some of the ideas in the post. In particular, I think that the main content of the post (the seven ways of improving our heuristic judgements), is really useful instrumental rationality, but that the introduction and conclusion hide it in poorly backed up statements about how reducing bias is less important than using good heuristics. I find it strange that these things are even presented in contrast; the techniques you give for improving intuition are techniques for reducing bias. The intuitive judgements become more accurate (i.e. less biased) than they were before.

Some bits of the two "Concluding thoughts" paragraphs seem especially washy. A general sentiment of "System 1 should work in harmony with System 2" sounds nice, but without any data to back it up it could just be complete bollocks. Maybe we should all be using System 1 all the time. Or maybe there are some activities where System 1 wins and some where System 2 wins. If so, which activities are which? Are firefighters actually successful decision makers?

One final thought: Do the seven methods really focus on System 1 only? Many of them seem like general purpose techniques, an in particular I think that 4, 5, 6, and 7 are actually more System 2.