The unusual items that Donald Trump, Mark Cuban, and 11 other successful people have in their offices

Mike Blake/Reuters

We all have our idiosyncrasies and bizarre routines that keep us sane. Certain objects and rituals add comfort to our lives and make us feel at home.

A comfortable work space is an incredibly important factor when it comes to being productive.

Check out how these successful people have made their offices their own with a variety of unusual, yet meaningful, items.

LeBron James likes to keep Bruce Wayne close by.

The NBA legend keeps a replica Batman mask in his pristine LRMR Marketing firm office in Akron, Ohio, according to ESPN.

"SNL" producer Lorne Michaels has a present from Reese Witherspoon in his office.

Vanity Fair reported that the creator and producer of "Saturday Night Live" keeps a dog-head inkwell that actress Reese Witherspoon gave him.

The comedian also has a bobblehead of his favorite New York Yankee, Paul O'Neill.

American businessman and presidential candidate Donald Trump has one of Shaquille O'Neal's sneakers.

During a tour of his office in Trump Tower near Central Park, Donald Trump showed The Wall Street Journal's Monica Langley one of his prized pieces of memorabilia: a shoe that Shaquille O'Neal took off after a game and gave to him.

"This is some serious foot," he said of the sizable sneaker.