The same strategies that lead you and your business to success can be your downfall.(Photo: MrLonelyWalker, Getty Images/iStockphoto)Ironically, the same traits that drove you and your business to success can also lead to missteps when time comes for you to sell the biz. The biggest culprit may well be your own eternal optimism. While a positive outlook on your business’s valuation spurred growth, viewing details of your sale through that lens can devastate your exit deal.Here are common misconceptions.Your perfect buyer is one call away. Entrepreneurs work extremely hard for success. After building a valuable company, you may find it hard to believe countless buyers aren’t eager to purchase your business.ADVICEIQSmart Biz Plan: OutsourceUnfortunately, nearly 80% or more of businesses won’t sell – ever. Reasons vary from lack of profit and declining sales, an inflated asking price, over-involvement of you the owner, unfamiliarity with the market, your over-valuing your own sweat equity or financial representations that can’t be substantiated.If you intend to sell your business one day, take necessary steps early to make this a reality.You run a billion-dollar enterprise. If you’re like a lot of entrepreneurs, you believe you’ll sell for four or five times EBITDA (earnings before interest, taxes, depreciation and amortization). This rarely happens.ADVICEIQBiggest Asset: Your JobTo keep expectations in line, research average sale prices in markets of similar companies. Don’t assume that another company’s selling formula (sometimes a multiple of assets, profitability, market share, customer demographics and other factors) will work for you – no matter how alike your two respective companies seem. Multiples also sometimes depend on the number of employees in your company.You and your biz are unstoppable. If you built a successful business, you probably overcame your fair share of challenges. That does not make your business immune to error, economic conditions or changing customer demographics, though.Be proud of what you accomplished as an entrepreneur – but also don’t mistake self-assuredness for indestructibility. Remain aggressive and competitive at all times; know your strengths and understand your weaknesses to make your company stronger before (and even during) its sale.You can conduct the sale yourself. Business owners who built a successful operation from the ground up often believe they have the know-how to manage the entire sales process on their own. Maybe, maybe not.ADVICEIQSmall Business Value ImprovementPossibly you can get the sale started, but the process soon becomes a time-intensive pursuit involving a lot of critical details. Selling on your own might hurt you in the long-run; without expert help, you’re likely to make a smaller profit.Just sign on the dotted line and head to Florida. As you daydream about your life after the sale, it ishard not to let your mind wander to the sunny beaches of retirement. Sadly for your toes that long to go in the sand, in most cases selling a business is an ongoing, dynamic process that may take as long as two years.Putting in adequate time ensures the best sale and strongest positioning for your business’s future. Just as when you built your company, selling takes a lot of time and effort.AdviceIQ — @adviceiq on Twitter — is a USA TODAY content partner offering financial news and commentary. Its content is produced independently of USA TODAY.