Goldman: Market going nowhere, so do this...

Traders work on the floor of the New York Stock Exchange.
Brendan McDermid | Reuters
Traders work on the floor of the New York Stock Exchange.

As the Dow Jones industrial average turned negative for 2015 in early trading Monday, Goldman Sachs and other Wall Street firms warned clients not to expect much more out of the overall stock market for the rest of the year.

So far, trying to invest in this sideways market has been futile, with the S&P 500 trading in its narrowest first-half range in its history, according to MKM Partners.

But Wall Street strategists said that doesn't mean investors should give up. There are plenty of ways to post healthy returns this year if you do your homework on single stocks, they said.

Here are the ways...