Akrasia is the state of acting against one's better judgment. A canonical example is procrastination.
Increasing willpower is seen by some as a solution to akrasia. On the other hand, many favor using tools such as Internal Double Crux to resolve internal mental conflicts until one wants to do the perform the reflectively endorsed task. The "resolve internal conflicts" approach is often related to viewing the mind in terms of parts that disagree with each other.