No success? Try working out at intervals! You can spend hours on the treadmill, but after twenty minutes, you stop burning fat and START burning muscle! Yikes. Instead, do intense cardio for one minute and then slow it down for another minute until your twenty minutes is up; it burns more fat that way, anyway!
I found this little gem through http://www.everydayhealth.co
and it has helpful hints that you can combine with your Spark advice.