Track your macronutrient intake
The most crucial factor in entering ketosis is limiting carbs, but there's more to it than that. But your macronutrients play a role as well.
It may feel unnatural at first to track your exact carb, protein, fat, and other macronutrient intakes, but it can help you stay on track with your diet. Many people consume considerably more calories and carbohydrates than they know, and tracking your consumption patterns might help you become more aware of your eating habits. Remember that: "Carbs are a limit, protein is a goal and fat is a lever". Some keto dieters like to use apps to keep track of their calories and track their success over time. You can experiment with different apps and options to find out what works best for you.