Eat less than 25g of carbohydrates per day, you will be in ketosis in about 24 hours when your liver glycogen is depleted.  Drink lots of water, and suppliment electrolytes (sodium, magnesium, potasium -- drinking a cup of beef broth every day and using a &quot;No-Salt&quot; substitute on nearly all my food is what I do) to avoid the dreaded &quot;keto flu&quot;.