When I began to blog, I had no idea how other bloggers were managing to find my posts. I was using categories and tags, but I did not know about the WordPress reader and had not noticed the posts, which may be found from the dashboard. The only way I had of finding other bloggers was from their Gravatars. Some of these were not linked to blogs!
Once I found the Reader I did not realise that I could find my own posts there by typing in the category. It is useful to see how much of a post is displayed. Fortunately other bloggers are usually helpful and I remember djfr kindly helped me gauge the amount of a post displayed. I am still intrigued by the way WordPress chooses which of a number of photos to display in the Reader.
WordPress warns that too many tags and categories disqualify posts from the Reader. http://en.support.wordpress.com/posts/categories-vs-tags/
The tags appear alphabetically on the preview in the reader and not all tags are visible there.
To encourage others to read my posts, should they happen across them in the Reader, I usually begin with something of my own, rather than quoting a prompt, which could be included later in the post.
Other ways of letting people know about a newly published post include connecting publicise, so that preferred social media accounts are linked with WordPress and on publication an automatic link is set up. I have only done this for Google+. For Facebook and Twitter, I have been posting manually. However I have recently learned how to do this automatically for Twitter, while retaining control of the wording and timing of each Tweet. I use an app for this.
The shortlink for each post is unchanged after publication so, for scheduled posts, scheduled Tweets work well.
Facebook has its own idiosyncracies. It does not always offer a thumbnail, when a link is shared. I have written about using hashtags on Facebook in an earlier post How not to make a hash of hashtags.