Have you considered what else you might give your readers, apart from quality posts?

It seems to be a growing trend (minimal at the moment, but bound to grow), to offer add ons from blog sites.  If you have an established or even a growing brand around your blog and especially if you have either designed yourself or paid to have a recognizable brand image designed for your blog why not exploit that ?

Sites like CafePress make producing branded products extremely easy.  These products can then be offered for sale or used in competitions.  Maybe you can use a post to setup a virtual treasure hunt on your blog.  Setting a challenge for a reader to hunt through your previous posts to find answers to questions.  The first person to post a comment with all the answers wins one of your branded items.

These types of contests are easy to setup, have a low cost of entry and if you space it over a few days, with a little promotion you can not only have some fun but increase your readership.  If you make it a success why not make it a featured event once every few months?

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