According to this recent article in Scientific American, the three types are 1) the Dunning-Kruger type, in which the protagonist vastly overestimates his skill or knowledge, 2) impulsive mistakes, and 3) mistakes of inattention.  I've never made any of those, have you?

http://www.huffingtonpost.com/linda-stone/is-it-time-to-retire-the_b_106624.html
By Linda Stone | Posted June 11, 2008
Nice article on the choice and execution of your life's content.
Time for me to turn off this computer for a while.