Question: what is the best way to invest extra cash?
Answer: Keep Calm and Sit Tight. If you have cash ready to go, don't do anything just yet. ... 
Don't Try to Get Rich Quickly. The same media outlets are saying that this is “a trader's market,” but most traders lose money. ... 
Look for Dividend-Paying Stocks on Sale. ... 
Dollar Cost Average. ... 
Think Defensively. ... 
Don't Buy Stocks.