Virtues - Besides Stat Tomes and Class Trait Points, the third "inherent" boost to your character's abilities are Virtues - especially as of Update 24.
Virtues are a type of trait that characters can gain in LotRO. Virtues grants bonuses to stats and are an important part of improving your character.
Each Virtue grants bonuses to 3 different stats. The first stat listed on the tooltip grants the largest bonus, the next grants a somewhat smaller bonus, and the last stat listed on the tooltip grants the smallest bonus. In order to gain the stat bonuses for a Virtue it must be slotted by double-clicking it or dragging it to the top bar in the Virtue page of the Trait Tree Panel (which by default is accessed by the j key). These are the long time bonuses which only required paying attention to the 5 best virtues for each class/class line selection.
All Virtues also grant a small passive stat bonus (either to Maximum Morale or Physical and Tactical Mastery) even if they are not slotted. (Note: even when you don't have any rank at all then you still get rank 1 passives.) These are the new bonuses that meant even if not slotted, there is a plus-up for each level the non-selected Virtues are higher!