The problem with santa100s explanation is that the definition of: "generating desire, endeavor, persistence, etc for the sake of the arising of skillful things" is the abandoning of unskillful things through not-doing.
Unskilful Things: lies, harming living beings, taking the ungiven.
Skillful Things: the abstention from lies, harming living beings, taking the ungiven.
One way of stating the goal of the Dhamma is that it is the ending of kamma. Kamma is intentional action.
Ending kamma is accomplished by abstention from the creation of new kamma while wearing away old kamma by intentional not-doings. E.g., faced with the desire to get that which can only be got by a lie, one abstains from the lie thereby bringing an old stream of kamma (the stream that resulted in the sensations that gave rise to the desire) to an end.
In the same way as we explain using desire to end desire, one uses intentional action to end kamma to end kamma.
There is here also a matter of stages. A very beginner would be well advised to intentionally create some good kamma as this will foster self-confidence. But it should be kept in mind that:
"The best course does not have a gains-honour-reputation-core,
nor an accomplishment-in-ethics-core,
nor a accomplishment-in-serenity-core,
nor a knowledge-vision-core.
But there is beggars, unshakable heart-release —
here, beggars the best course is for attainment of this.
This is it's hardwood.
This is it's encompassing end.
Another way to describe the goal which also points to not-doing, is:
This is it!
This is the culmination!
That is, the calming of all own-making,
the resolution of all involvements,
the withering away of thirst,