Coupons...crazy or worth it

I'm debating on whether or not to add couponing to my list of money saving efforts.  Why the debate? Well for household items its all good, I mean a $1 of a Gain is alright in my book.  The issue comes into play with FOOD.  I don't eat a lot of boxed or processed foods and those are the items that seem to have the best coupons.  I have yet to see a $.50 off coupon for a bunch of Kale or better yet $1 off of chicken breast!  I've tried the whole coupon thing before and all I got out of it was a bunch of newspaper laying around! Alas, I think I'll give it one more shot. I'm going to check out Krazy Coupon Lady and see what tips I can get - its not like I'll be doing any shopping so hell, I have the time.