You should have

Many times we say. I should have done this earlier. You should have done this earlier. If you did, it would have saved me time, efforts.... 

It takes more than realization after an experience to be able to go around the should have questions. For someone who can foresee the next few near consequences, its takes a lot of experience and falls. 

But then again, i look up with people with this sort of leadership/preemption talent. Its more of a gift i think.