How do you make sure you eat well even when you’re on the road?

Tbh I even don't know about it that how i manage but still I do..I make sure I don't eat oily or junk foods like pizza,burger and fries etc. as they're bad for health but if you want them then once or twice in a month you can consume them, i believe what you eat, it affects to your mood as well as health so yes eat healthy and stay focused..thank you!