Here's a great example of a clean professionnal logo design!
In order to design a nice, professional logo, the structure has to be right. Here you can notice that the logo has been composed with the symbolic abstract icon on the top, left corner and two consecutive lines. One for the name of the company and the other for the slogan.
This type of logo design composition is quiet frequent. It is also very important to use the right colors, you must find the suitable colors for your logo design. It is advised to have matching colors between the logo icon and the texts.