To raise [[carpentry]] initially, below 40 to 50, one of the best ways is by building [[House (general)|houses]].
Later, the main carpentry skill can be raised by improving mallets [[mallet]]s and [[fishing rodsrod]]s.
Beyond 50 to 60, a good way to raise the main carpentry skill is to develop the subskills, ie [[fine carpentry]], [[bowyery]], [[fletching]], [[toy making]] and [[ship building]].