I don't know how travel computes in to your math here but I'm never really home enough to justify buying "raw material" groceries unless I can cut quantities to a weekend or so worth. I hate spending $200 at an organic grocery store and then chunking/giving away everything on Sunday.

My latest tweak to my breakfast routine is a bit Mediterranean. At home (and virtually everywhere I travel) it is typically pretty easy to find a Middle Eastern grocery. I get some olives and white cheese, which seems to have a decent tolerance to being out of the fridge for a few hours (I'm still alive, so working to this point). I pack baggies of olives and 2 or 3 triangles of the cheese. I eat one at the hotel and one as I'm leaving. I stick the last in my laptop bag and eat it around noon. That holds me until an early dinner and, since I'm not eating as late as I used to, I have an easier time getting to sleep and have less in my belly during my inactive periods.

The best part is I've been able to get this concoction through airport security 99.99% of the time....I only failed once. While the olives have olive oil on them, I guess the round shapes don't draw attention on the xray.