Nutri grain bars are a fantastic invention, I eat them for my breakfast whilst at traffic lights or at level crossings. For my lunch I usually eat a bag of crisps (In the USA chips?), the light versions,( because they are less greasy so I don't mark my work) and usually a piece of fruit. Sometimes, I take a proper packed lunch but I don't like squished sarnies!
which tends to happen a lot, especially under the weight of my A&P book!
Another tip, is a pot noodle, or other pasta snack, because the coffee machine,will just give you hot water. Quick, and warm! Very important at the moment!