First mouseover your recently created post around the selected area.
This should pop up, from this list of options select flair.
Under the dropdown list choose the pertaining flair, based on whether its an Article, A question, A discussion, something you want to Share, or just an update on something shared previously. Click save and your flair should be applied.
Mouseover this area on the bottom of your recently created post right above the commenting area.
A set of options similar to these should pop up, select flair off the list.
From the dropdown list that occurs pick the pertaining flair. Don't forget to click save, your flair is now applied.