For a blogger,related posts are important to improve your blog’s pv.wordpress now has many related posts plugins ,here are two for you,one is simple tags,the other is aizatto’s related posts.feilong suggest you simple tags much.
Tagging for WordPress 2.3+ ! Tags Auto completion, Suggestion,Tag Cloud Widgets, Related Posts, Mass edit tags!Simple Tags author is Amaury BALMER.heire is an post about how to install simple tags.
Aizatto’s Related Posts
Returns a list of the related entries based on active/passive keyword matches. Inspired by Related Posts .Aizatto’s Related Posts author,Ezwan Aizat Bin Abdullah Faiz.