Decision making involves choosing between alternatives and can be rational or irrational. Barriers to good decision making include being too hasty, narrow, or scattered in one's thinking. The decision making process involves defining the decision, considering all choices, gathering relevant information, selecting the best choice, implementing a plan, and monitoring results. The ABCDE model outlines assessing the problem, brainstorming solutions, considering consequences, deciding and acting, and evaluating the choice. Protective factors like a loving family and clear goals promote positive decision making, while risk factors such as low self-esteem and pressure can lead to negative decision making.