When I decided to become a vegetarian, I had conducted a lot of research in order to justify making it a healthy and worthwhile lifestyle. I am a "documentary freak", if you will, so I spent a lot of time doing research by simply turning on my Netflix and watching movies about eating organic and/or eating vegetarian. The one documentary that officially changed the way I think about food is Food Inc. The information found in the documentary is mind-blowing. I was hooked within the first five minutes. If you have some free time and want a little bit of motivation, watch it. It does not try to force you to adopt a vegetarian lifestyle, it more explains the details of processed foods and why you should choose more organic and locally grown foods.
I dare you to watch it!