It is a well established fact that planning for a financially secure retirement is most effective when you begin saving and investing early and stick with the plan. And, one of the best ways to ensure a safe and secure retirement is to have a retirement plan in place from the moment you take up employment. While contributing to pension plans by way of provident fund is a given for the salaried, there are several other ways in which you can save and invest towards your retirement. But, that is all to build what is known as a nest egg or a retirement corpus that will see you through retirement.