Make or buy the bedding. Either construct or buy bedding for your earthworms to eat and reproduce in. The bedding can be any dimension that you like, so long as it is about 12 inches high. Do not use pressure-treated lumber, and do not paint or stain the inside of the bedding. Pressure-treated lumber, paint, and stain can be poisonous to earthworms. Fill the bedding with a mixture of torn-up black-and-white newspaper and garden soil.

Go down to your local bait shop and buy a bucket of worms. Buy two pounds of earthworms for every pound of refuse your home produces each day. This garbage will feed the earthworms. No need to buy any fancy worms. Just buy standard redworms.

Feed your worms. Worms eat human garbage. Everything getting thrown out of your kitchen--moldy bread, rind from citrus fruit, coffee or tea grounds, leftover oatmeal--is an earthworm's delight. Stay away from meat-based products. These will attract larger animals that will ruin your earthworm bed.

Harvest your worms. Once a month, pull your worms out of the soil. The easiest way to do this is known as "table harvesting." Take a pitchfork and remove the top 4 inches of soil. Put the soil on a piece of plywood covered by a plastic sheet during daylight hours. Remove the top inch, then wait a few minutes. Repeat this until there is no soil left.

Sell your worms--either by the side of the road, to a local bait shop, an organic farm supply store or to an earthworm retailer. There are lots of options in how you choose to sell them. Track your expenses. Calculate how many worms you have. Decide what you want your profit margin to be. Now calculate your price.