Gather your kitchen wastes such as food remnants, fruit peelings, vegetable scraps, etc. and add that all to a composite bin. Add some water and leave it for about a day. You may add sawdust to speed up the composting process. Then, add some natural waste from your garden (like dried leaves, bark, old branches, etc.) to the compost. When you notice it has turned into a dark-colored soil-like mixture, spread that on your garden soil and use as an organic fertilizer.