Turn failure into a greater success. Every situation will throw up winners as well as losers. Defeat can, however, be turned into victory by a slight shift in attitude.
The first step is to accept gracefully the fact that you lost. And that you lost because there was something that you did not have and the winner did; do not blame others for your defeat. Focus on that something, understand it and, in doing so, identify your weak areas. Now try and figure out ways of working on those areas. Look at your present defeat as an opportunity to improve yourself and also something that may possibly help you shift focus onto something bigger and better.
Sometimes it may so happen that you are trying to succeed at something that you are not meant for, and greener pastures await you elsewhere. If that is so, understand that. Focus your energies towards areas more suitable to you. Shifting your goal may open up a whole new world for you, one you may not have dreamt of earlier.
And remember -
"Koshish karne se mushkil aasan hoti hai ,
Milne se kya bol tamanna kum hoti hai"