If a person is already at their desired weight or reach their goal weight. how many carbs should the aim for to stay healthy and on track?

I read the book front to back on Saturday and started implementing right away. Have done well but today I am hungry, hungry, hungry. I ate a great lunch and yet 2 hours later I feel like I haven't eaten in forever.  So I had some almonds, then some cheese, and still feel hungry. I drink lots of water already and of course, as we all know, water doesn't hit the spot when you want to eat. I don't know what to go to since I so used to eating fruit in between meals or making a smoothie...any suggestions?