Could have, should have, would have done

Practically our life consists of things that we have done, but theoretically it is consist of things that we could have, should have, would have done or haven’t done.

In the last year I have used every minute of my time. But when I was young I spent a lot of time doing nothing. I could have used to study more, increase my English skills, and take additional classes. I would have organized my time and would have made my schedule more efficient. I shouldn’t have slept so much; I should have used that time to identify my future goals.

History doesn't let us commit the same mistake twice. So let use our time properly and never say that we should have done something in the past.