Another point to add is the worst case scenario is hardly ever as bad as you think its going to be. Its very easy to over-estimate the amount of work it will ta

Another point to add is the worst case scenario is hardly ever as bad as you think its going to be. Its very easy to over-estimate the amount of work it will take to recover from a setback. Sometimes it takes experiencing a setback before you learn this. The confidence you gain from the experience can sometimes be worth more than the gain from everything going as planned.