I failed the 1 hour by 4 points, and passed the 3 hour no problem. I think my OB was surprised I passed the 3 hour because of the weight I'd gained early on in pregnancy. LOL
It was suggested to me to eat according to the GD eating guidelines for the majority of the rest of the pregnancy. If it comes back and you aren't diabetic, I would suggest eating according to the guidelines, but not beating yourself up if you don't for a day or so here and there. Like, give yourself a day where you eat whatever you want.
High proteins, lower carbs. That's basically all you need to focus on, should you not have GD, but want to follow the guidelines. A lot of women here are REALLY helpful as far as eating plans and ideas go! :)