What exactly do you mean by 'lately you've slacked off'?? Thats important info, not so much the rest of the year you have smoked..
Exercise exercise exercise while staying really damn hydrated.. (Its a great time to try to hit say 185lbs) ontop of everything else you try.. I'd highly suggest avoid trying to smuggle anything in there.. They may make that virtually impossible to smuggle, and they will test the temperature of the sample..
You might want to hit a medical forum and see if anybody can give info regarding how exercise and that sugar consumption play together time frame wise.. They're two opposing approaches, ridding your body of cannabinoids, and pushing them into a hidden corner.. It would suck if they just cancelled each other out..