Hi! Quality content is: 1. Unique 2. With some value, except (3) 3. Not sales pitch Agree with Worfik, let's try to see what content you would like to link to? Something that is really useful for readers of your web-site. So if you are running web-site about dogs, I'm sure if you will find some good, detailed article about dogs, which give a lot of information and advice, then you will link to it. I think that good idea to start is to make your texts not promotional, but informative.