I think you obviously know that it is very good to get backlinks from different sites to your site. If you don’t know then please read what is Backlinking and how it can help you in SEO. Now you can find out easily that which sites are linking to your site and its content. This can be done through any analytics software you use or even through some free online tools available.
So now when you see that some site is providing link to your site, say thanks to that site. As you know getting linkbacks means getting traffic and money, so it’s good to be grateful this time and say thanks in a more beneficial way. You can backlink to that site just to show your gratitude for linking to your content. In this way that site will also have some traffic ranking and hence some money, with your help. So this will be better “thanks” for that website.
Now are you thinking that why I will do all these just to say thanks to that website? Other than the fact that you are helped by the website, there is another reason which tends to play by your side. This is a way to make the links strong which links to you, and hence making yourself strong. You are increasing the value of the pages which are linking to you and hence indirectly increasing your own value. As you definitely know that the value you get out of your backlinks is very much dependent on the value of the pages backlinking you.
So now on say thanks to everyone who is linking to your pages in your style and benefit yourself. But not only to benefit you, it’s a good consideration to give and get. After all, that site has also considered linking to your content and may expect something back from you. This will also help you to make a trusted network of good neighbors around you.