Answer
I would advise him to try and exercise in the mornings or at least several hours before bedtime.
Also, alcohol consumption right before bedtime is not advisable. Eating heavy foods before falling asleep such as pizzas and burgers can contribute to a bad night. So the advice would be for him to eat lightly at least 3 hours before going to bed.
Step-by-step explanation
In conclusion:
1. Exercise in the mornings, or at least several hours before bedtime.
2. Regulate alcohol consumption in general, and try to avoid drinking beer right before falling asleep.
3. Regulate the type of foods that he is consuming right before bedtime.
4. Try to elaborate on a night-time routine.