One of the best ways to increase your income and give yourself a solid foundation by which to grow into self-employment in the futureis to start a side business of your own. If you choose the right business opportunity, there's room for you to keep growing your customer base on the side, while keeping your day job. From there, if you take the right steps, you'll be able to grow your side income beyond that of your day job and launch into the world of self-employment.