I bring a hard boiled egg, an ounce of cheese, and sometimes some veggies, like celery and a couple of cherry tomatoes to munch on. After induction, you can have an ounce of nuts. I've started to make Atkins muffins, and sometimes take one to work with me as a snack in the late afternoon. I've found that I have to have something legal on hand in case I get hungry. That way, I am not tempted to grab something high-carb.

You could also cook a chicken breast the day before and cut it up into cubes to munch on during the day.

As for expense, I get the boneless chicken breasts on sale, usually for less than $2 a pound. I hardly ever pay full price for meat. I always get it on sale, or marked down in 'day late' sales, when the meat has to be cooked or frozen today before it spoils. If you have a freezer (I don't) you can really take advantage of sales. I buy butter for 1.99 or less per lb. on sale and freeze it. I also make liberal use of coupons.

Hope this helps. Good Luck!