To the people who gave all the good tips:
First of all thank you for your cooperation.
Second, I have seen all your comments and put a few here that were slightly different form the other comments. 
 

To the readers:
babogurl  on Jun 9, 2013 15:36:00 says:  
exercise is the easiest and fastest way . It is kinda tiring though , but if you exercise more it would be easier 
AVOID FAST FOOD . 
Eat healthily . Honestly , try to do more sit ups rather than crunches also , sit ups are more useful than crunches . 
go for jogs . go cycling , swimming , or rather , playing in the playground or the fitness corner of a playground helps too XD
 

anne197  on Jun 9, 2013 15:45:00 says:  W
What I did to help me was going to the gym but I had to stop due to various reasons, and that was really helpful.
What I do now is I always try to move. Even if I just tap my foot when I'm on the computer. Doing tricep/bicep curls with a 2L bottle in either hand is also really helpful.
The funniest way, though, would be jumping on the trampoline (if you have one, sadly, I don't anymore T_T) or learning the point dance for your favourite group (One Shot'll kill you).
Good luck with it! I wish you the best!

notdaryldixon  on Jun 9, 2013 17:10:00 says:  
DO IT HEALTHILY OH MY GOD I CANNOT STRESS THIS ENOUGH.

Do NOT do and crash diets. Simply eat 3-5 healthy meals a day, cut out snacks and sugar (not completely, unless you want to) and exercise every day if possible. Walking is the best thing in the world, so try to walk rather than taking a car (or you could bike or roller skate, they're cool too). If you have access to a gym, then you could try that, but don't push yourself into doing things you can't otherwise you'll injure yourself (speaking from experience).

CodeBreakerJJ  on Jun 9, 2013 19:14:15 says:  
Egg diet!! And do some exercise too.. I also practice one meal diet and ate eggs for dinner..

To read all of the answers click here: How to loose weight?