Here is a round up of some snack deals you might want to consider at CVS:
Chex Mix == 2 for $3 (printable coupon for .50/1, also check Sunday paper for .50/1 coupon) = $1 per bag (5.5 oz- 8.75 oz) printable coupon here
General Mills == Spend $10 on select GM products, get $3 ECB back
Cereal bars are 3 for $6, get printable coupon here for .50 off one Fiber One 90 Calorie brownies
and/or printable coupon here for cereal bars or a printable here for .50/2 Nature Valley bars
Cinnamon Toast Crunch, Honey Nut Cheerios, and Total (10-14 oz) on sale for 3 for $10 ($3.33/box), get printable coupon here for .50/1 box Cinnamon Toast Crunch or .75/1 printable coupon here for Total.