underestimating time

i always do this....i always seem to think that i can do 100 more things that actually end up happening.....i tend to overlook the simple but tedious steps of things...like prep...which often take more time than the actual thing you are doing....it doesn't matter what it is...i always do it, it's annoying, i need to get better at this!  that way i can have a realistic outlook of my time...like applying for jobs always takes WAY longer than it should.....cooking sometimes takes ages for simple stuff.....studying too.....checking email......looking up something......trying to learn anything.......i must think im super human and can do these tasks at flash speed....im sorry to say im realizing im not super :P