In addition to other suggestions here, you can also simply add ".sci-hub.cc" to the end of the domain part of the URL when confronted with a paywalled paper.
I find this the easiest interface. It allows me to search using standard search engines (PubMed, Google Scholar etc) the duck into sci-hub as required.
I find this the easiest interface. It allows me to search using standard search engines (PubMed, Google Scholar etc) the duck into sci-hub as required.