The distinguishing characteristic of the lizard-brain is primarily the conservation of energy. Instead of pushing its stuff around all over the place, the lizard puts its stuff in one place and stays there. It only picks up and moves when it sees something useful and desirable, or when something distressing and undesirable shows up.
There are very different problem-solving strategies as you progress through the different animal levels, honestly. I mean the bucket-brain solves nothing. A bucket-brain just kind of sits there and waits for stuff to show up, but if it doesn't land in the bucket the bucket-brain just sits there and bitches that someone else got his stuff.
The beetle-brain trundles around all over creation, but doesn't really make much of an effort to find anything. It's like an imitation of the dog-brain; it knows that dogs run around all over the place and then say "look, I made thousands of dollars; look, I lost eighty pounds; look, I got to date this hot model." But the beetle-brain doesn't understand the purpose of the running. The beetle-brain simply cannot comprehend why the dog runs where it runs.
So the beetle-brain trundles around and blunders right past stuff that would be nice to have, then sees someone else get it and says "that should have been mine!" because he was near it first. He just wasn't looking.
And the lizard-brain is kind of where this starts to even out, because the lizard-brain has gone "wait a minute - if I sit around, nothing comes to me at all, but if I just wander around blindly I walk right past important stuff." And it learns to sit until there is a reason to wander.
Of course, the dog-brain is where you figure out there is always a reason to wander if you look hard enough, and constant motion combined with vigilance makes things even better. But we'll talk about that later.
Lizard-brains are learning one of the most important parts of being a badass: if you don't know where you're going, one direction is just as good as another, but if all directions are equally good there is absolutely no reason to think what you want is in any of them.
Lizard-brains are making a further distinction from "I have no reason not to go there" to "then again, I have no reason to go there, either."
And that's an important distinction, because it allows you to save money and time. This is where you begin to transcend the ubiquitous "shiny object syndrome" where you buy every damn thing under the sun for a while (bucket-brain activity) and then you try every damn thing under the sun for a while (beetle-brain activity).
But you're not quite over it yet, because you still tend to fall for every trend that comes along. You sit there and say "I don't need to buy the WSO of the Day today" and "I don't need to start making CPA offers" because you know "someone is selling it" and "someone made a lot of money" are not good enough reasons for those things.
What you still tend to fall for is "this launch is going to be brutal!" and "this method is dead, try this new thing instead!" - both of which arrive on the horizon and make you go "oh fuck yeah that's the kind of thing I want!" and off you go chasing them. You get accustomed to the surroundings, and you go "yawn, a WSO" or "yawn, a success story" because these things are constant.
And you just haven't been around long enough to know the brutal launches and proclamations of a method's death are every bit as constant. You'll start to yawn at those, too. It just takes a while longer, so you can develop perspective - probably a couple months.
You find that a lot. Indeed, from my observations, people tend to progress from one stage to the next in one to three months, usually around two. And then they stagnate in whatever stage they're never leaving. I know a lot of dog-brains. We'll talk a little about that and why it's not where you want to stop after Music Video Saturday.
On another note, this is the 200th post published here. That's kind of amazing and I'm really glad you've been here for it. Thanks for sticking around.