One of the most common mistakes in starting a business, is not conducting proper due diligence before creating your brand. This means researching whether an identical or similar brand already exists and getting clearance you are not infringing on another’s intellectual property. Gaining proper clearance prior to investing in your trademark  saves time, money and potential legal issues in future.
 

Know as well that merely registering your business name with a state or country agency or acquiring a domain does not convey any right to use that name in commerce as a source identifier or trademark. For example, I can presumably register my new tech start up "Boogle" with the CA secretary of state because there is no other business already doing business there under that name, but this does not mean that I would not be infringing on the Google trademark, which I would be. The onus is on you to ensure the name you choose is not a problem.
 

Your trademark will be one of if not the most important and valuable business assets you will have and you will ultimately spend more money in support of it than you will anywhere else (advertising, marketing, PR, branding, packaging, etc.). So you owe it to your business to make sure you handle this properly upfront and the first order of business always starts with a proper and comprehensive clearance.