If I had a dollar for every time I’ve learned not to go into meetings (or any interactions with other people) hungry, then I could probably hire a personal chef who would follow me around and serve me food in time to avoid me being very cranky and obnoxious. And unhappy.
But I don’t have those dollars or that chef, so I need to learn, either once and for all, or (more likely) over and over again until it sticks, to EAT well before I get to starving, no matter how busy I am.
Why is this so hard to learn?
Jane's Lessons Learned 
I have problems with this too! Especially because I go from not hungry to STARVING in ten seconds! Must run in the family!