Do you eat 5-9 servings (that's a minimum of 2-3 cups) of fruits and vegetables a day? If not, then get started by increasing fruits and vegetables. Current research does not show that you will live longer eating "clean", "organic", "raw"....but it does show you'll live longer if you eat more fruits and vegetables. You don't have to become a vegetarian, just shoot for 1-2 servings at each meal and 1-2 snacks that include a fruit and or vegetable.
If you can afford lots of organic fruits and vegetables and will eat them, go for it. If not, it's more important to get more fruits and vegetables, and get them most days than for them to be organic.