I get rather sleepy in afternoon lectures and wondered if avoiding the usual carby lunches that are available in the canteens (i.e. sandwiches or pasta) might help. So far I can only think of:
Soup - not really hot enough by lunch time.
Chicken drumsticks - a bit messy if I'm perched on a bench somewhere as there's not many places to eat your own food at uni.
marinated strips of beef with salad...
...er...
...er...
I wish I liked fish, but I don't...