I would cook a bunch of food and freeze it, and then I'd never remember to take it out of the refrigerator in time for it to be thawed for dinner. I detest microwave-cooked meat, I don't care how you do it. I'd then have to go out to get something quick.
Like Marturion says, it's a real feat to cook for one! I'm trying to cook for two now and I still can't get the portions right. See, our own four kids plus we had the 14 foster kids over a 25 year span, so they weren't all at once. Life went on, everyone went to school and then college, and most recently we had 5 college kids living with us. All their college friends who came over were always hungry, so I usually cooked for a crowd on a daily basis; seven people at the least. One day, the kids sat my husband and I down in the living room, where they told us they were all moving out, and "It's time you guys were on your own now."
After the shock went away, the scale-down was amazing! So much less laundry (and less soap expense) and towels to wash, fewer dishes and less picking up things that were left where someone was done with the item, and among other things my favorite part is that now we can afford to buy fish and Nutella! I know I still pee with the bathroom door open, but that's a habit that will break if I ever realize fully that I actually have privacy.
That being said, I know I would get out a bowl of Froot Loops and maybe some toast, and for the next meal, I'd see how much Froot Loops was left. I don't cook just for me, but that's because I have someone always around.