How to design a beautiful Logo?
 

Friends, please give me useful suggestions/tips to design a beautiful logo with best effects?

Use adobe photoshop latest version software called Creative Cloud.
Search few sample logos in the Internet.
Suppose you are designing a logo starts with 'S' then search s logo samples then search related icons to the related industry.
Then you can get good idea on how to design a professional Logo.

You can create a unique logo with adobe illustrator but obviously you need a good designer