if eating is a problem, I suggest getting a notebook (a pretty one, if it makes you more likely to carry it around and use it!) and write down every single thing you eat and drink, and I mean everything.

then have a column on the right, where you write in how many calories/kilojoules/grams of fat and sugar/whatever in it.

then keep a list in the back, telling you how much [activity] it takes to burn [x] calories/kilojoules/grams of fat and sugar/whatever.

so then the next time you go to have a tim tam, you get quicker at deciding whether you actually want to eat 30 minutes on the cross trainer ... or whether you'd actually be just as happy with a mandarin ...

and when you go to cook something, you're a little more intentional - and accountable - about portion sizes, the amount of oil/salt/cream/whatever you put into it, etc ... both because simpler foods are easier to calculate (and are generally much healthier) and also because while yes, that meal might be richer and yummier with xyz in it, you don't actually need it, and you'd prefer not to have it added to your exercise list ...

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if exercise is the issue, the best motivation I find is figuring out a way to make it really enjoyable ... is there someone around who you can go for a nightly walk with? or go swimming 3 x a week with? do you stay at the gym longer if you have music? do you want to join a netball/basketball/tennis club? how about salsa dancing? zumba, on your loungeroom floor?

anything you like, you'll do ... even if it's forking out $100 for a cheap exercise bike which you put in front of the TV - and then tell yourself that instead of sitting on the couch and watching your favourite program, you have to cycle for at least half of it ...