If you must satisfy one of your cravings, downsize. Opt for the smaller-sized package if you know that you can't resist the temptation to eat more.

If ice-cream calls, make it an occasion and build in la passeggiata - a walk to your favourite ice-cream dispensary (yes, it can have the same allure as a drug) and choose a cone - that's one serving versus the entire carton.

Yes, it is more costly to buy just one - financially speaking, but what about the cost circumfrencially speaking? About those joints - they'll be happy to bear a little (or a lot) less weight, too.