First of all, a trademark should suit your business. You can make yourself prominent in your industry by trademark your identity but for this purpose it should be competent and represent your wholly. To do so, you should know about how to conduct a comprehensive trademark search that will help to improve your visibility and notability to be registered. In this way you will know if there is any similarity in your idea with the existing trademark or pending application, so in case of any, you can make modifications to reduce the chances of rejection. What other points should we consider?