Investing is a way of making your money work for you, so that you can make funds ready for many of your life's goals. Put in simple words, investing is a means to the end. While saving is a great habit, you have to ensure that investing your savings in the right way helps meet your objectives.
Goals
Whenever you invest, keep your goals clearly in mind. There are many stages in life when you will need large sums of money, e.g. college education, marriage, buying a house or car, and finally, to provide for your retirement. Some goals like retirement require long-term, systematic investment, while others are short term and need different methods.
Budget
Your investment budget needs to balance your future requirements against your current needs. Thus, of all your earnings and savings, you have to set aside some for household expenses as well as unexpected contingencies, and place the rest in investment instruments which will mature over different time periods.
Risk Appetite
Most investments are fraught with risks of one kind or the other. Generally, the more the potential returns on the investment, the riskier it is. E.g. Shares can be very rewarding but are unpredictable, whereas a fixed deposit has almost no risk, but the earnings are very low. Risk should be balanced such that there are allocations for both growth and conserving capital.