Now that I made my comment about the starved cardio issue, I thought I'd contribute a bit to the actual losing weight question.
When it comes to this your biggest things is going to be diet....theres no one that can make you eat properly....so in the end it will have to be you thats paying attention to what you eat.....I suggest trying to get something in your system every 3 hours, as to keep your metabolism up....even if your working on a caloric deficit you'll be doing yourself harm by not following basic nutritional common sense like eating every 3 hours and eating breakfast.
Now theres common sense diets out there like The Weight Watchers Diet....which, no matter what anyone might tell you is not for Little old ladies....theres diets that are a bit tougher like The Get Shredded Diet
....and also very extreme diets like The Velocity Diet
....The velocity diet being EXTREMELY hard but effective.
But like I said its you that has final say in what you eat....and drink/dont drink.
As far as the cardio goes....HIIT is extremely effective at fat, as are other methods, such as the Tabata Method....which can be done with weights or cardio and when I say weights I mean full body movements like the clean and press/squats/thrusters....not curling/bench press/whatever.
This training method is so simple, yet so incredibly difficult:
1) For twenty seconds, work at maximum intensity
2) Rest for ten seconds
3) Repeat seven more times
That's it! Although it sounds easy, it's guaranteed to be the hardest four minutes of your life.
Another Great Fat burner is a Complex.....
A complex is a series of movements completed without putting the bar down. Grab a barbell or dumbbells (anywhere from 35-65 total pounds will work great for most people). Walk over to a spot in your gym that gives you a good four feet around. From there you'll perform a series of six movements without stopping or putting the bar down.
Bent Over Row
You'll perform six reps for each movement. Example: Romanian deadlift x 6, bent over row x 6, etc. Rest for half the amount of time it took you to complete the complex. Repeat for the allotted time (ten minutes). Most people will complete 4-6 rounds. Most people watching you will think you're a badass.
...and keep the ego in check with this one...use smaller weights to begin with.
Other small tricks involve
..doing full body workouts
..keep your rest between sets to 30 seconds, so as not to let your heart rate down