Google has a lot of flaws, but all other search engines are much worse in quality, so abandoning Google is not an option for most people. You are right about bookmarking, but there's also additional practices like: using adblockers, ignoring ads manually (basically, just never clicking on them if they appear), verifying SSL. The biggest risk of getting scammed by malicious search results is when  you use a service for the first time, so before depositing your coins or installing some software, users should always verify that this is official sites by searching for mentions across the web and verifying signatures when possible.