Best way is the invest in the crypto currency like BTC i guaranty it
For me the best way to manage your money us save to the the trusted bank. Limit to spending money because now a days its so hard to find money and keep it to your wallet. Be wised to spend your money.
The best way of managing free money is very easy for those who are knowledgeable about any business. Investing your free money in any product will give you good returns if you do with knowledge and by applying your knowledge you can not be busted in any business. The modern world says Bitcoin because it is the most productive currency out there in the global market.