Retirement security is a holy grail that many investors chase. A recent AARP survey revealed that 74 percent of private sector workers are anxious about having enough money to live comfortably in retirement.

Although increasing savings may seem like the answer, creating a sustainable retirement strategy is a bit more complex. Investors must also plan for costs that can detract from their portfolio's growth. "Taxes, long-term care and inflation all have the potential to eat away at your retirement savings," says Marcy Keckler, vice president of financial advice strategy at Ameriprise Financial in the greater Minneapolis-St. Paul area. "Not planning properly could result in a substantial blow to your portfolio from a sudden need for extended care, or inflation could slowly chip away at your nest egg."