"Do not save what is left after spending, but spend what is left after saving”- Warren Buffet, Billionaire investor. To understand why savings/investments are critical, think of different life goals coming your way.
You would want to save enough money to buy your first house or your first car or to travel the world with your friends/family. In long term, you might need a lot of money for higher education of your children.
The first principle is to develop the habit of saving. Whether you are a salaried employee or run a business, you should always be disciplined when it comes to savings.
You should aim at saving 10%-15% of your income if you have a family to take care of and children and around 25%-30% if you are single.
Set up an auto debit from your account and start putting your money into fixed deposits, recurring deposits, mutual funds, etc.
Doing this will not only ensure that you will have less money to spend, but will help you build assets during the time of emergency.
There are various products where people invest their money such as fixed deposits, recurring deposits, post office, savings account, gold, real estate, mutual funds, etc.
What is the purpose of investing? Do you need your money in the next 1-2 years or after 4-5 years? What is your risk appetite? These are some of the questions you should ask yourself before you start investing.