Hang in there! The lapband really is a tool. I'm 7mnths post op now and couldn't be happier. At first I had a hard time, but then realized it was up to me to control what I put in my mouth everyday. You have to make a personal committment to yourself. It really is a whole way of life. I had to learn self control which was the hardest thing for me. Don't get me wrong, I do have those moments where I just have to have to eat something bad, but those moments are few and far between these days. And when I do have those moments they are in moderation.
As the weight came off, it got a little easier to exercise too. Now I excercise 30mins a day 6 days a week. Once I hit my goal I will cut it back to 3-4 days a week, but realize I will have to do it to maintain.
Just like people have already said, protein is the key. Filling up on protein really does make a difference.
You'll have bumps along the road and plateaus too, I don't know of anyone who hasn't. Just keep moving forward and focus on why you did this. I even made a vision board and hung it in the room I exercise in. I keep a picture of it on my phone motivation too.
Just remember why you started and don't give up. It's easier to give up, but if it's worth having, it's worth working for too!