Cutting your carbs is the best way to achieve ketosis. Other actions, such as consuming coconut oil or exercising in a fasted state, may also help. Quick and easy methods, like using special urine strips, can let you know whether you're maintaining ketosis or your diet needs some adjustments.
Attempt one to three days of water fasting to induce ketosis. This allows your body to start burning fat, which fuels the body and the brain. When you allow your body time to rest, rejuvenate, and heal, you will feel energized, focused, and less hungry.
You want to keep your glycogen levels depleted so your body relies on fat for energy and not sugar. However, if you're going for a Keto diet, I recommend just staying on a water fast and focusing on having a healthy balanced diet afterwards.
The most common reason for not getting into ketosis is not cutting back enough on carbs. According to a 2019 article on the ketogenic diet, carbohydrates should represent only 5–10% of a person's calorie intake. Specifically, most keto diets require a person to cut down to between 20 and 50 grams of carbs each day.