My top stock market investing tips after a decade of investing

first_img Click here to get access to our presentation, and learn how to get the name of this ‘double agent’! 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. 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. Our 6 ‘Best Buys Now’ Shares There’s a ‘double agent’ hiding in the FTSE… we recommend you buy it! I’ve spent the last decade of my life investing in companies trading on the London Stock Exchange. There have been a lot of ups and downs in that period, as well as lessons learnt. These are my top stock market investing tips, which I’m applying to my own portfolio.I want to share these because investing can be a lonely and at times frustrating endeavour. Often I’ve found my biggest enemy is my own mind and temptation to tinker too much, or trade when I get bored. That rarely works for me, so instead, for sustainable success, I’m going to concentrate on the following.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…Hold my winnersFor any long-term investor, one of the key things to do is hold on to winners. If I think a company has an ongoing competitive advantage, why would I sell now for a 10% or 20% gain if I could potentially have a far greater increase in the value of my holding in the future? The only reason would be if I need the money for something better.Overall (and this isn’t a view that only I hold), I feel it’s best to exit losing positions early while holding on to shares that are performing well.  Do my own researchMy second stock market investing tip potentially even more important. The key to finding shares with an ongoing competitive edge has to be to do my own research. By all means, be humble and listen to the opinions of others. But responsibility for my portfolio and the decisions I make, ultimately, are mine alone. I intend to always do my own due diligence on any new long-term investment that I’ll add to my portfolio. This means looking at the financials, the annual report, the market opportunities, how a company compares to its competitors, the quality and backgrounds of the management team and so forth.Invest for the long termThirdly, having spent a decade investing, I’ve come to the firm conclusion that I’m best suited temperamentally to long-term investing.This isn’t the same as becoming emotionally attached to a share, or holding out of stubbornness. It’s instead about owning parts of businesses that I think will do well for a long time. If I can add them to my portfolio at a fair price, all the better.Investing for the long term is about mindset. It’s about patience, having a vision and a strategy, about putting in the work to find companies that will thrive over the next five years or more. I purposefully avoid unproven technologies precisely because, at any point, the investment case could come crumbling down.At the end of the day, my approach after a decade is working reasonably well, allows me to sleep at night and not spend all day looking at the markets. I aim to avoid selling my winners, do plenty of research and invest with years and decades — not weeks and months — in mind.  My top stock market investing tips after a decade of investing Enter Your Email Addresscenter_img Image source: Getty Images Simply click below to discover how you can take advantage of this. Andy Ross | Friday, 21st May, 2021 Don’t miss our special stock presentation.It contains details of a UK-listed company our Motley Fool UK analysts are extremely enthusiastic about.They think it’s offering an incredible opportunity to grow your wealth over the long term – at its current price – regardless of what happens in the wider market.That’s why they’re referring to it as the FTSE’s ‘double agent’.Because they believe it’s working both with the market… And against it.To find out why we think you should add it to your portfolio today… Andy Ross owns no share 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. 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