That's exactly the formula I've been following since graduating and entering the job market. Save all the excess and invest it (don't leave it sitting ideal in some cash account), and when compounded over time, the idea is to "smooth out" the downturns via a lifetime of steading investing. Constantly adding more to the portfolio every single month, without fail, via diversified funds of funds - which let you diversify as much as you like without having to invest into 100's of individual stocks separately.
More people need to know this - financial education I feel is a huge, gaping hole in our traditional education system. Most grads have absolutely no clue about any of this - leaving formal education with no idea about personal finances - yet as a result of that very education, they will now be paying off their degree for the next 5, 10 or plus years!
Thanks for sharing!