I found not taking that one last bite to be the hardest thing for me. I have always been a fast eater and I had to learn to give myself time to know when I was full. Not eating with the meal didn't bother me but I seem to always want 1 drink after eating and I'm usually too full for that.
My biggest advice is eat Protein. For the first 6 weeks I had very little carbs (only those I had in my protein smoothies). I followed the eat protein then veggies, then carbs very literally. Most meals all I ate was protein because I was full before I had ate a full serving. Dr Eibes laughed at me at the 6 week appointment and told me to go have a salad but I personally think me following the instructions so literally helped me.