LPT: Received an email that appears to be from (say) Amazon or Netflix or something, but it doesn't specify an order you genuinely made? Go directly to the real website through your browser instead of clicking any links in the email.
On a computer in particular (as opposed to a mobile phone) you can hover over the link without actually clicking on it. This of course isn't foolproof, as a "fake" URL might use similar-looking characters, but it should catch some of the "weaker" attempts to scam people.