If you make your smoothies with added almond milk, you will get the protein that will help stabilise your blood sugars; it tastes pretty good and it's low carb and calorie. Or as Binky says nuts are a great snack for avoiding energy crashes.
I just noticed you have had some coconut water... I love that stuff. I am going to have to get some now, you have given me a taste for it lol.
Keep up the good work, you're doing so well sticking to your diet. xx