So, first of all take photos with your laptop or desktop. Make a theme for example the way how you see pictures of ads in TV's online and others. For example look at Airtel ads , Grameenphone ads and how they take photos with the electric gadgets. Don't forget a shiny smile.After you take a great photo post in the CSL FAN CLUB wall and tell your friends to like them. This content will depends how much like you will get. The more likes the more chance to win the contest. So, tell all your friends ,family and others to like the photo also it will be depended on the CSL FAN CLUB fans as well.
Link of the contest page - CSLFanclub