I can't eat for an hour after I take my morning medication so when I take my meds I look at the clock and then grab some food and take it with me as I leave. This morning I brought a granola bar and a banana with me to class. The start of class was roughly an hour after taking my medication so I used the start of class as my cue to remember to eat.
The biggest thing for me is to carry healthy food with me. Lately that includes apples, bananas, granola bars, and string cheese.
EDIT: Oh whoops I wandered into the South Beach forum - so if the foods above don't make sense that's why.
But as for remembering to eat I try to tie eating to some cue to help me remember like the start of class, or when I get home, or once my paper is done, etc. I have ADHD so I'm always trying to add extra cues to my day and pairing things works fairly well for me.