I am a frugal, from scratch kind of cook, so it has been an education for me to think in terms of cooking for the college student. Obviously, a dorm- or apartment-dwelling student doesn't have the time, space, or incentive to cook the way I do.
So, frugality needs to be second to convenience. After all, if it's not convenient to cook something, you can always pop in a frozen dinner or go out for fast food. Not that good--or good for you, but easy and cheap.
I have been perusing Amazon's grocery offerings of late. I found a few things that would be worth buying. These all get free shipping if you spend over $25.00. Maybe it's worth it to have your ingredients delivered to your door.
Item 1 is polenta.
I make my own polenta, natch, for about 1/10 this price. But the price on Amazon for the pre-prepared is about the same as at my local grocery. You can slice polenta and use it as a base for various toppings. You can layer it with cheese and tomato sauce for a kind of lasagne. Only downside: you have to buy a dozen, so make sure you like polenta.
Item 2 is tofu.
This too is about the same price as in the stores in my area. I'm sure it's cheaper in an Asian grocery. You can stir this into soup. In fact, if you stir it into the ubiquitous ramen and throw in some frozen spinach, you've got a pretty healthy meal.
As a last example, my favorite tomato sauce.
I got a year's supply at my fave store Big Lots a while ago--for $1.00 a can. Still, this is great stuff on pasta, pizza dough, and so on. Unlike most canned stuff, it doesn't taste like metal.
Do you think it's worth it to pay more for food that is delivered?