If you prefer to buy organic produce, it is good to know the vegetables and fruits that are most likely to contain some levels of pesticides. They are:
-apples
-cherries
-strawberries
-nectarines
-peaches
-potatoes
-lettuce
-celery
-bell peppers
-spinach
-carrots
Of course, it will save you $ if you can grow some of these produce yourself. I tried to grow lettuce and carrots one summer; the carrots flopped while the lettuce leaves had a lot of holes from being eaten by some insect. I'll have to try again this summer. There is a farmer stand down the road from where I live and they have a nice selection of produce but sometimes they don't have the ones that I need. So I end up getting my vegetables from the grocery. When I have the time, I opt to use the handheld barcode scanners where you scan every purchase and put it in the bag and at the end you print out the total and pay. This is fun for the kids but I find it more time consuming.