How do you come up with your ideas?

Like many people have very unique ideas where they come up with them for there forum? what gives the inspiration to come up with these ideas? i really can't think of any unique ideas and need someone to help me out with how i can think of some.

 

unique ideas for what? Branding, content, promotion?

 

Anything like for your forum like new ideas no one else has thought of kinda like when the first person thought of a forum shop where you can buy forum items or like promotion board whatever it may be.