Kathleen Wyble Graham discusses 8 common mistakes people make when saving for retirement. These include forgetting about inflation, having an improper asset allocation, underestimating taxes, underestimating spending needs, unrealistic investment expectations, underestimating lifespan in retirement, mismanaging tax-deferred assets, and failing to plan for unexpected healthcare costs like nursing homes. Proper retirement planning requires understanding your current financial situation, goals, and following a consistent plan that accounts for these potential pitfalls.