Habits are the compound interest of self-improvement. The same way that money multiplies through compound interest, the effects of your habits multiply as you repeat them. They seem to make little difference on any given day and yet the impact they deliver over the months and years can be enormous. It is only when looking back two, five, or perhaps ten years later that the value of good habits and the cost of bad ones becomes strikingly apparent.
One of the key paradoxes in Buddhism is that we need goals to be inspired, to grow, and to develop, even to become enlightened, but at the same time we must not get overly fixated or attached to these aspirations. If the goal is noble, your commitment to the goal should not be contingent on your ability to attain it, and in pursuit of our goal, we must release our rigid assumptions about how we must achieve it. Peace and equanimity come from letting go of our attachment to the goal and the method. That is the essence of acceptance.