To-go foods?

I feel like I’m always running out of the house with nothing healthy in my system before a long day. I need some good ideas for quick and healthy foods that I can grab on the way out. I don’t mind prepping the night before, I just can’t think straight at 6:30AM about what food I should bring to school. I’m getting pretty sick of PB&J, carrots, grapes and granola bars. Help a poor grad student feed himself!