Your best bet is to learn how to read a food label properly and learn the foods that are best to buy organic. Just because something says it's organic, like cereal for example; doesn't mean it is. It means it has organic ingredients, but not necessarily 100% organic. Fruits, veggies, meat, dairy, eggs, etc are all best to buy organic if you can.
Start adjusting things slowly. If you have kids or a picky husband, it's best to change slowly and NOT make a big deal of it at first. If you say "this is an all organic, gluten free, grain free, dairy free, vegan meal!" odds are they won't even give it a real try, lol. Just make the changes (slowly so their taste buds adapt) and don't even tell them until they're eating that way mostly.
Also, I'm not saying to make meals that are all those things, haha. It was just a silly example.