I have half my breakfast at home and the other half at the office. I found I really like the Kashi chewy granola bars - either peanut butter peanut or the trail mix. I'm not sure about their content really (oops) other than they are high in fiber (5g).

Someone stopped me in the office kitchen yesterday and recommended Thomas light wheat english muffins (8g of fiber). I will be looking for them at the grocery this weekend. Toasted with a bit of jelly or cream cheese or peanut butter would be a good snack and hopefully with the high fiber would be filling.