Avoid carbs (including sugars) whenever possible, at least at the macro level (like servings of noodles, rice, bread, and potatoes). That will get most people 80% of the way towards the Keto Diet. The next 20% is tougher, as you have to go through what you eat, item by item, to actually obtain it (for example, nuts have some carbs, but the amount varies greatly by which type). Also, get over fear of fat, saturated fat (typically from red meat), meat itself, and salt...that was all bullshit.