Although I don't buy organic food (it's a bit too costly on my current budget), I do tend to buy organic or pesticide-free potatoes, carrots, and berries. Similar to what others are saying, I'm making sure that I don't eat processed foods. So I'm going the route of 'freshly prepared' food rather than 'organic' food as a way to control the amount of sugar, salt, nitrates, etc. in my diet. This means a lot more work (preparing soups, not buying sandwich meats but roasting my own meats, etc.), but I'm hoping will be better for me.
And agree with others---if you are able to have a veggie garden, then it would work best. We have lettuce, garlic, onions, potatoes, carrots, spinach, leeks, beets, tomatoes, peas, beans, kale all growing in the garden. It was a bit of work getting it all started, but are really appreciating it more right now. If only our summers were longer!