You need to think about what is sustainable over a long period of time. While it is tempting to use large amounts of exercise as a way to control/lose weight, I can guarantee that eventually, as Marni said, you will burn out and in the end, perhaps not achieve your goal. All the things people have posted are good strategies.
I might look at portion control and when you are eating, in addition to everything else mentioned. But, I think the most important thing is to remember that when our quest to lose weight becomes like a job, it's not healthy.
When I had to lose 25 pounds, it took me close to a year. But, 30+ years later, it's still gone.