One should think about their skills, hobbies and basic daily habits as well. Do you like to cook? Be a personal cook or dinner parties. Baking? Make wedding cakes or cupcakes for weddings/special events. Do you enjoy cleaning? Trying going to banks/repo companies and ask if they are in need of a repo cleaner or market yourself as a all-around cleaner. Know how to mow a lawn? Get paid to do it in your neighborhood. Sell products from large companies – Jewelry in a candle, Sentsy, Health and home products – etc.
Borrowing could be a key element in this method. Say you borrow $200,000 and put in $50,000 of your own to buy a property for $250,000. Then you develop the property and sell it for $400,000. The property has increased in value by 60% but your $50,000 has now grown fourfold to $200,000. You have to select the right properties in the right areas and develop them wisely.