In continuing with my lessons learned series, this one is of a more personal nature, but relates to a corporate job and personal life. 

Know the difference between a Plan and a Goal
A plan is a series of actions and steps to take to achieve a goal.  A goal is a desired state of existence that people set for themselves. 
A plan is a tactical means to achieving a vision, which is represented by a goal.
Having a plan without a goal or a goal without a plan is not productive.  You cannot have one without another.  If you have a plan and no goal, then anything you do could be counterproductive to your goal once one materializes.  Conducting tactical steps without working towards a vision is a waste of time and energy.  Conversely,  if you don’t have a plan to achieve your goals, then all they will ever be is a vision that is unattainable.
Balance your Plans and your Goals
Living your life by a plan can be positive, if you have a clear goal.  However, keep in mind that a plan should be flexible and change.  Never follow a plan to the letter and fail to change or alter it as you go because it will ultimately ensure that you miss your goal.
Change is constant.  As a result, in order to achieve your goals, you may have to change your tactics in mid-execution. 
Always keep your goal in mind when changing or formulating plans to reach them