[ceratopisan]

Completely avoiding sugars and grains? That's not easier; you trade a less complicated rule for severe diet restrictions. Applying that rule about less processed foods will help with sugars and carbs too.

i.e. an apple and hard candy both have sugar, but the apple is a good idea. A cupcake and a loaf of whole-wheat bread both have carbs, but the bread (especially if it contains only yeast, flour, water, salt) will be way better for you.

[tdicola]

It's not a severe diet restriction--you can't completely get rid of carbs but you can easily get down to 20-50g per day. Stick with eating proteins (meat, sausage, chicken, etc.) and most green vegetables. Some nuts and berries are ok too but be very careful about fruits (especially juices which are a massive glycemic spike without any fiber to balance it). After a few weeks you won't miss bread and grains at all. In fact on the rare occasions I have it I think pasta and grains are incredibly bland (try zucchini noodles with a spiralizer, it makes an awesome meal with some sausage and a bit of diced tomatoes and spices).