grocery shopping

I am the most inefficient grocery shopper. I wander through the produce section, pick out my fruits and veggies and get all the way to the other end of the store before I realize I forgot the bananas. I do this multiple times during my shopping excursions. I'm always backtracking. Thus why my trips to the supermarket can last for at least 2 hours. I think I need to get my shopping list a little more organized.