Buy fruits and vegetables in season from local farmers markets. It is cheaper when you buy in season and you are benefitting your local farmers. You can buy meat/fish when they are on sale and buy in bulk and freeze what you don't need just yet. If you have a Costco card you can buy many organic foods in bulk. Also, if you have your own backyard try growing your own fruits and vegetables. Even if you are in an apartment you can grow herbs in small places like right by your window. You do not have to eat heaps of meat to do this diet like some people will make you think. You can do the volume of your grocery shopping on fruits and vegetables. Just as long as you are eating real foods and eliminating the bad PUFA's and wheat you are most of the way there.
"If man made it, don't eat it" - Jack Lallane
People say I am on a "crazy" diet. What is so crazy about eating veggies, fruits, seafood and organ meats? Just because I don't eat whole wheat and processed food doesn't make my diet "crazy". Maybe everyone else with a SAD are the "crazy" ones for putting that junk in their system.