After living in a house of 4, shopping for one was a real struggle. I started shopping in big grocery stores where nothing is packed for individuals.
At first, I tried to cook a different dish every day, but the leftovers remained at the back of the fridge and eventually went bad before I remembered they were there.
Then I bought Jamie Oliver's book " Saving with Jamie", who gives a great advice: Prepare a big elaborate meal on Sunday and use different recipes with the leftovers the rest of the week. ( See http://www.jamieoliver.com/savewithjamie/ )
It worked at first, but the truth is that by Friday my palate was tired of the same chicken it'd had every day since Sunday.
I eventually started going to farmer's markets or butcheries where I could buy the right portions for me, but shopping there is more expensive than any grocery store, so I had to make a balance between fresh meals and saving money.