Pillar posts should address a topic that is related to your blog. So before you sit down to write one, consider what issues are meaningful to you and your readers. For example, if you write a blog about animals, you may want to put together a pillar post on the best house training techniques or teaching animals to respond to commands. If your run a blog about shopping then you could do a pillar post on the best online shopping sites, or the easiest ways to save money shopping. The choices are endless, regardless of your topic. You just need to pick one you feel you can expound on with authority.
Since pillar posts will be longer than your traditional blog posts, consider writing a short outline so you can keep track of the important points. A great format for pillar posts includes one to two introductory paragraphs, explaining the goal of the post along with its importance, followed by a list or sub-sectioned body that includes specific details about your topic, or carefully outlined steps. Wrap the post up with a nice concluding paragraph encouraging readers to look around the site for more info, or contact you directly with questions.
It is good to provide links to other resources at the end of your pillar post, as it will provide readers with more information and help you generate backlinks to the post as a reputable source.
Since pillar posts will hopefully introduce many people to your blog, be sure to edit it carefully for spelling or grammar mistakes - this is supposed to be an informational post, save the smiley faces, "lol"s, and other slang for your more relaxed posts.