Retirement planning is more difficult than saving for other goals in life because of the many variables involved, and that uniqueness is why investors should approach it more as an "art" than a science, says Gary Williams, author of "The Art of Retirement". Before haphazardly creating a retirement plan, investors should understand behavioral finance to better understand how our brains deal with money and markets, says Williams. He also says investors should know their own money habits when deciding whether to make their own plans, or have a professional guide them.

Disclosure: TheStreet's editorial policy prohibits staff editors and reporters from holding positions in any individual stocks.

More from Video

Former U.S. Education Secretary: Voters Are to Blame for Struggling Schools

Former U.S. Education Secretary: Voters Are to Blame for Struggling Schools

Meet Blackbird, the New 'Uber of the Skies'

Meet Blackbird, the New 'Uber of the Skies'

Here's How to Trade Walmart, Nordstrom, Macy's and J.C. Penney After Earnings

Here's How to Trade Walmart, Nordstrom, Macy's and J.C. Penney After Earnings

Here's Why Stock Picking Is Especially Important in the Retail Sector

Here's Why Stock Picking Is Especially Important in the Retail Sector

Tip For Financial Advisors: Think Outside the Box

Tip For Financial Advisors: Think Outside the Box