Guava leaf tea and a teaspoon of raw honey before bed can help stabilize blood sugar levels, promoting better sleep. Choosing the right late-night snack is crucial; aim for a 200-250 calorie option that consists of about 70% carbohydrates to boost serotonin production. Ideal snacks include avocado on rice cakes or non-sugar cereal with almond milk, steering clear of dairy to avoid stomach issues.