Absence of fears does not mean the absence of common sense
You still have with yourself your rational reasoning and body's programs of self-protection. But having got rid of fears, you will not perceive these programs as absolute imperatives, but just as one more reason ("it is better not to jump, because I can die"),
not related to fear. Or, if you
have to jump (like Castaneda did), you will need some practical experience-based confidence, which is not self-confidence, but just some empirical fact. If you are free from ego, you will be able to consider such facts objectively enough.
So, as you can see, you need not to have ego to make rational deeds. Simply ego-free reasoning has another nature.
I have never seen any good book about getting rid of ego. But there are tons of texts convincing you in necessity of ego, some of them are written in very aggressive manner.
If you need the rule of thumb for controlling the ego-free state, I can suggest you the next one:
no one your action should be controlled by your fear, laziness or stupidness.
I prefer not to talk about confidence in oneself, because it is
very easy to mix "pure" ("correct") state with ego-protecting self-confidence. And almost everybody does this mistake. That's why I usually talk about another side of the "correct" state -- absence of hesitations and uncertainty. This side is much easier to understand and control and the probability to make mistake in this direction is much less.
