I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. Want to make a million in the market crash? I’d listen to Warren Buffett and buy cheap UK shares See all posts by Harvey Jones This year’s stock market crash has thrown up an unmissable opportunity to buy cheap UK shares. If you are on a quest to make a million before you retire, you need to take advantage of moments like these, as you can pick up some amazing FTSE 100 bargains.It takes courage, though. Stock markets are volatile and the economic outlook is uncertain. Some may prefer to leave their money in cash instead. That is understandable, but also costly. In the longer run, the stock market beats almost every other investment, and definitely cash. If you can buy UK shares when they are cheap, you can turbo-charge your returns.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Buying undervalued shares after a stock market crash has been a sound move in the past. Warren Buffett, arguably the world’s greatest investor, has always followed this strategy. He likes to buy high-quality businesses when they trade at low prices, then wait for them to recover.I’d buy cheap UK shares todayIt is always better to buy at the bottom of the market cycle, rather than the top. I think we have this opportunity today. Please don’t squander it. As Buffett himself said: “Opportunities come infrequently. When it rains gold, put out the bucket, not the thimble.”Indexes such as the FTSE 100 and FTSE 250 do not move upwards in a nice, even straight line. They never have and never will. Instead, they go through periods of boom and bust.Wise investors look to buy UK shares during the busts, rather than the booms. That way you can buy them at reduced prices. You should then aim to hold for years, or rather decades. With luck, you can sell them later at much higher prices.If we do get a second market crash after you invest, remember this. You have only suffered a paper loss (provided you don’t do anything daft, like sell at the bottom of the market). By investing for the long term, you can ignore short-term volatility, and sleep soundly at night.Warren Buffett has been here beforeIf you buy shares after a market crash, as Buffett likes to do, you have a better chance of making a million. You have to pick your stocks carefully, though, as he does.One mistake investors make is to over diversify, say, by buying a stock in every sector of the FTSE 100. If you do that, you might as well buy a tracker fund. You need to be smarter than that. As Buffett said: “Diversification is a protection against ignorance. It makes very little sense for those who know what they’re doing.”Personally, I would look for companies that offer a product or service that nobody else does, and rivals would struggle to replicate. Given today’s worries, I would also target companies with strong balance sheets, minimal debt, and the strength to continue paying dividends.As always, you should aim to hold for the long term, just like Buffett does. “This Stock Could Be Like Buying Amazon in 1997” Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! Harvey Jones has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors. Enter Your Email Address Our 6 ‘Best Buys Now’ Shares Harvey Jones | Thursday, 27th August, 2020 Simply click below to discover how you can take advantage of this. Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. Image source I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool.