Easiest Way To Avoid Duplicate Content Penalties
I was just browsing through the blog of a very reputable member here and couldn't help but notice they were at risk of incurring a duplicate content penalty from the search engines (if they hadn't already).
It's all about excerpts. By default, almost all WordPress themes set you up to fail here. When you make a new post, the whole post will be shown on the homepage of your blog. But when you click on the title of the post, you'll be taken off the homepage and onto that post's specific page. That's the problem.
You cannot have the same content on multiple pages within your site! If you're displaying the full blog post on your blog index and then the full blog post on the actual blog post's page, you've got yourself a nice case of duplicate content syndrome.
Don't worry, easy fix. It's called using an excerpt. What you want to do is display only a preview of the full post on your blog index. You can do this by using the 'More Tag' as shown below.

By doing that, you only have the full post on the actual blog post's page, not on the blog index as well.
Yeah, it's pretty basic knowledge, but I was surprised to see that some people weren't aware of this.
Fast & Easy Content Creation
***Especially if you don't have enough time, money, or just plain HATE writing***