As opposed to stable state decisions. 

I've experimented with both approaches. 

A stable state decision is one where I delay making the decision to a later time when my mind is not on the topic and thus has a higher probability of making a rational decision. For instance, if I feel like buying a new pair of earphones, I don't go on Amazon and order a pair the moment I get the idea. Instead, I write myself an email to do so and schedule it to come back to me in a few days. A few days later, when I get my own email asking me to buy a new pair of earphones, I then make a rational decision as to whether to buy one or not. 

Stable state decisions help prevent mistakes and help prevent us making decisions that we will regret later. It is like asking an angry person to count to ten before they act in anger.

Peak state decisions, on the other hand, are the exact opposite and are made at a time we are emotional and exuberant and likely not very rational. For instance, if I'm struck by the idea that I should create a podcast, I publish that intent to others immediately when that idea hits me, so that when I calm down and am rational again, I don't reason out the pros and cons and back out of the decision. 

Peak state decisions help prevent procrastination, avoid fear and forces us into action. 

As you can see from the examples, they are both useful for certain kinds of decisions.

Far too often, we use them in the wrong situations. We make peak state decisions when we should be making stable state decisions, and vice versa.