This stub is about the method to persevere to accomplish an objective, rather than the biblical perseverance from persecution and hardship.
Steadfastness in doing something despite difficulty or delay in achieving success.——Oxford Dictionary on perseverance.
Here is how to persevere:
First identify the cause, then convince yourself that the cause is valuable and worthwhile to pursue. The value may need to be revisited later when losing momentum; it helps to be constantly reminded of the value in order to stay motivated.
The key to perseverance is not to overstretch. The steadfastness implies that you have to find a pace at which you can comfortably make continuous but incremental progress. It has to be a sustainable effort.