Financial planning is the process of meeting life goals like buying a house or saving for retirement through proper financial management. It involves gathering financial information, setting goals, assessing one's current situation, and creating a strategy to meet goals given present and future circumstances. A financial planner can help by taking a holistic view of a person's finances and recommending a suitable plan to achieve their objectives. While self-planning is possible, seeking a professional is recommended when expertise is needed, for unexpected events, or to improve an existing plan. Common mistakes include failing to set goals, make isolated decisions, or reevaluate plans periodically.