You will be able to invest only when you have money to invest. You will have money to invest only if you have saved some. You will be able to save some money only if you have avoided spending it or deferred the spending for the time being. You invest because you want to earn some money by investing. You invest on what you think will earn you money. You need to make an analysis of what opportunities are available to you. There are a whole lot of economic activities around you all the time. These are in the area of production of goods for consumption. Or there are services being provided. Investment in any of these activities could offer you a profit.