I busted through my last plateau doing "double days."
I did about 15 minutes more exercise per day but I broke it up into two parts. 30 minutes in the morning and 30 more minutes in the evening. I also worked out HARD. Harder than I would have if I would have done 60 straight minutes.
My background is in accounting so I just keep telling myself that numbers will win in the end. Your body may fight you, but math is math and if you are using more calories than you are eating the weight WILL come off.
Good luck!! YOU CAN DO IT!!!