The easiest and probably the most cost-effective link baiting technique is to post unique blog articles that online users might find interesting to read. The trick here is to offer something truly and comprehensively unique, obviously because there will be thousands more like you trying to achieve the same thing.
So, how do you create one? Well, if you are creative enough, you can do it yourself, but in case you lack that ability to create something valuable out of nothing, then you might have to get help from professionals.
If you have the requisite funds, you can hire professional blog writers and give them the task to create truly and comprehensively unique blog articles for your website. However, just make sure that you own the copyrights, obviously because if you do not do so, other websites may stake their claims on that interesting piece of content that you might be planning to use as bait for generating the required back links.