If you want to live a happy life, tie it to a goal, not to people or objects.
What stops us from achieving that goal? Thousands of small things which can all be lumped together as forgetting the goal and how much it matters, how infinitely much it is worth.
Good objectives should be SMART, specific, measurable, achievable, realistic, and time-bound.
We may have to struggle to achieve our goals, but our struggles may yield as much growth as our learning. The strengths we develop in overcoming challenges will be with us in the eternities to come. We should not envy those whose financial or intellectual resources make it easy. The stuff of growth was never made of ease, and persons who have it easy will need to experience their growth with other sacrifices or forego the advancement that is the purpose of life. Dallin H Oaks Learning and Latter-day Saints Ensign, April 2009