I haven't done it, but I did buy a cookbook once called "once a month cooking". Basically, they had the meals for a month planned out and you did all of the chopping, etc. at once, and then froze things. I would think that you could figure out a few recipes that use the same ingredients and cut everything up all at once, and then make them and freeze them. Many veggies are fine kept in the fridge cut-up for a few days. Or figure out a few recipes that use the same sauce (i.e. spaghetti sauce, that could be used for lasagne as well) and make them at the same time.
I'd be interested to hear other people's ideas!