Priorities

Matt 6:33  But seek first his kingdom and his righteousness, and all these things will be given to you as well.

The world tells us that we must make a plan and work that plan to be successful.  It defines success for us as reaching notable status in our pursuits and tells us that we are in charge of our own happiness.  Yet when we look at famous and notable people contentment and joy are not the words used to describe them.  They suffer high rates of divorce and mental illnesses.  Why?  Because their priorities are out of balance. 
Certainly scripture tells us to accomplish our tasks to the very best of our ability (Col 3:17), but we need to choose those tasks very carefully.  For students in High School, your task is to do the very best you can in school to ensure you're equipped for whatever God calls you to do in life.  The next steps in life require earnest prayer to choose whether to further your education in college, if so, which college, what major and so on.  These choices launch you on a vector for life and thus must be chosen with extreme care.  The world is telling you to make something of yourself which is consistent with ancient western agnostic thinking that we are all gods.  Nothing is further from the truth.  There is but one God and we're not Him. 
As we proceed through each day, we must consciously choose to follow God first and foremost.  He has promised to light our path (Ps 119:105) which means He will give us the discernment to take just the next step or two in life.  Failure to be sensitive to His direction risks a step off the path of His perfect will.  If you truly want contentment and joy, seek God first and He will guide you into the best decisions.  Once called, do your best at each task and He will continue to use you for His kingdom work (Matt 18).  Failure to follow God risks making poor choices which might seem good at the time, but ultimately lead to frustration, division, and lack of fulfillment.  Choose this day whom you will serve.  If it is God, then quit playing around and get serious about seeking Him first.  If you choose to follow your own path, I pray God's protection over you - you'll need it eventually.