Why do we push so hard to reach certain goals? Staying up all night to finish a paper for school. Cancelling plans with friends to go to the gym every day. Working late and missing family to finish some elusive project.
What's the use?
Motivation can be fleeting. But there was a reason you started on this path; something that, at one point, seemed important enough to strive and work for.
I go back to the goal. What's the point? Will this effort help me get there? Is the goal still worth it? If yes, it's worth staying the course - the journey and end result will be worth it.