Wordpress blogs have duplicate content issues, and one of them is allowing reading the same content on both the posts, index page, archives and categories webpages. To avoid search engine penalty it is important to optimize your Wordpress installation so that duplication will be avoided.
There are a few ways to do that :
 
Optimizing using Wordpress excerpt
Instead [...]

Keeping your Wordpress installation and plugins updated is an important yet annoying task. Following and the news on Wordpress releases, monitoring the versions for the dozens of  plugins installed, and then going through the upgrade can be very time consuming, especially if you’re running a few blogs. This post includes a few tips and ideas on [...]

Meta-tags aren’t as important as they use to be, but they’re still an SEO factor that might help boost things up a bit. Some smaller search-engines rely on meta-tags and some of the big search-engines still use the description meta-tag in SERP when displaying your site’s description. Meta-tags are quite easy to optimize by quickly [...]

Page-titles is one of the most important Search Engine Optimization (SEO) factors. Wordpress out-of-the-box page-titles behavior is not optimal and Wordpress page-titles SEO can be improved dramatically. Page-titles are easy to optimize by quickly tweaking your Wordpress installation and following a few simple guidelines.
To make page-titles more SE friendly :

Page-titles should be different for every page. [...]

Headings (H1, H2, H3) are an important SEO factor that is often not optimized in Wordpress themes. There is a common agreement that a right headings design make a big difference for search engines as the search engines rely on headings to understand what content is about. Headings SEO (H1, H2, H3) for your Wordpress [...]