Found this insightful short story in "Happiness Trap" by Dr. Russ Harris.
A mother decides to take her two kids to a fantastic Zoo which happens to be 2 hours drive. One kid has only one aim: to get to the zoo as fast as possible. All the way there he's sitting on the edge of the seat, in a constant frustration, every few minutes whining "Are we there yet?" " I am bored". "How much longer?"
Second kid has two aims: to get to the zoo as fast as possible and to appreciate the journey. So, this second kid is looking out the window noticing all the fields full of cows and sheep, watching in fascination at the giant trucks and waving at friendly pedestrians.
Now, if the car breaks down half-way and the kids never reach the zoo, then which kid had more rewarding journey? and if the car makes it to zoo, both kids will have a great reward - but still, only one of them has enjoyed the journey.
Living in the moment, appreciating where we are rather than focusing where we are not is the key to avoid happiness trap.