Good suggestions. Here are some others.
Fibre One brownies. 90 calories and also are a chocolate fix.
Add Grape Nuts to yogurt for some interesting crunch.
Beans like garbanzo or black beans tossed with your salad.
I eat steel cut oats for breakfast and often add ground flax seed. I cook 4 servings and refrigerat and then preheated one serving.
And add chiaseeds to yogurt and smoothies.
Btw...it's OK to use Beano and Gas-X.