Set up a regular eating schedule.
Everybody is different so do what works for you but it tends to be best to eat smaller meals and have some snacks so a total of 5-6 times per day.
Eat breakfast within an hour and a half of gettin up and reduce meal sizes to fit in snacks so that you're eating regularly.
Try packing healthy snacks to take along and batch cooking for quick meals.
An example of a schedule is:
Breakfast - 6:30-8:00
Snack - 9:30-10:30
Lunch- 12:30-13:30
Snack - 15:00-16:00
Dinner - 18:00-19:30
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