I think investing is not a best way. Because you can loss your money that you have hard work for it. And we are talking about saving not how you can earned. My idea or my thread helps you how to do that.
Investing is the best way if you love your chosen investment. Of course
don't choose an investment that the risk is "obvious" like investing in HYIP and PONZO schemes. There are lots of worth to try investments. With the proper plan, investing can boost your saved money rather than relying alone on your fixed sources.