Is the MS intended to make for lack of experience? Is there something specific the MS offers that you will not get otherwise? How much research have you done on getting into one of your Dream companies?
Define the goal - what does it take to get a job with <BIG TECH COMPANY>.
Gap analysis - What do I offer? What do I lack? Am I willing to do what it takes to fill in the gaps in my tech profile?
Make the plan - I need to do these things to achieve my goal.