If you really want to lose weight you can try tabata training, if done properly it is incredibly difficult but extremely rewarding.
Basically, for 4 minutes (8 sets) You do sprints such as push ups, Self Delete planks and all the other goodies like loving CRAZY for 20 seconds, then rest for 10 and repeat. Look up a good type of sprint for weight loss but i mostly do push-ups, grasshopper and Self Delete planks. If it doesn't push you to breaking point you're doing it wrong.
Example video-
http://www.youtube.com/watch?v=xmJeCyHBvVk it might not look that intense but trust me, it is.
EDIT: also this is NOT an everyday exercise, unless you want to destroy your muscles and stump yourself.