The word worship comes from the word worthy as Meriweather so astutely pointed out. And I think she may have touched on worshiping is for us and not for God but I want to expound on that. Setting aside the theology that God is complete, lacking in nothing and in need of nothing - which justifies my belief that worshiping God is for us and not Him - I will approach this from a practical or natural benefit stand point. But first I have to set the stage.
Most people don't realize - or take for granted - the amazing gift we have been given. We have literally won the cosmic lottery. And that applies to each and every human being who has ever lived no matter their experiences in life. We are the pinnacle of creation. We are beings that know and create. The most complex thing that creation has produced. We get to experience existence. Existence is literally made manifest by our minds. The very fabric of what we are made out of was created out of nothing ~14 billion years ago. It's pretty incredible stuff if you stop to think about it.