Note: The following is part of Morningstar.com's Retirement Matters Week special report. A version of this article appeared on Sept. 21, 2016.
Some errors in retirement-portfolio planning fall into the category of minor infractions rather than major missteps. Did you downplay foreign stocks versus standard asset-allocation advice, or hold a bit more cash than you needed? It's probably not going to have a big impact on whether your money lasts throughout your retirement years.