Basically, any product that is made with refined sugars (cane sugar, corn syrup, high fructose syrup, etc.) and/or is made with milled cereal grains (flour for instance) is an unwelcome source of carbohydrates.
Pasta, pizza, muffins, bread, cake, fruit juice, soda, commercial cereals (Capt'n Crunch), etc. The list is to long to write.
Eat whole foods. As a rule of thumb, shop the interior perimeter of your grocery store where you will find whole, fresh foods. The processed and refined foods are generally found in the inner aisles. Substitute white potatoes for sweet potatoes or yams.
There is a diet plan called the "Warrior Diet" by Uri Hofmelker. He says to fast all day and eat what you want in a two hour window sometime in the evening. Google "Warrior Diet" to find out more of the details. In a nutshell it is a variation of IM.