Accpet it nd try better next time but doesn't make a habit of accepting defeats all the time.

Where is the button?

The best way to accept defeat is to see what can I do better, or what can I learn from this. its all about the mind and being positive in everything.

 It is not possible to win every time. We lose and we win. A defeat is one battle, not the war. A defeat is just one moment in life. The important, as many people have already said, is to learn with our defeats , mistakes and not commit the same error again. We should  take life as life is. We should accept a defeat with dignity, as a really good player should do.