Whether you have a plan for where you want to go in life, or you approach life with a "wherever the wind blows" demeanor, I'm finding that working towards a goal, any goal, is what matters. Building momentum in a direction wins over having a clear destination and action plan for getting there.
Plans face resistance. Given a perfectly detailed 10 step plan for accomplishing your goals, 6-8 of those steps will change by the time you reach them. This is the nature of getting things done in the real world.