As you build your mailing list, you should notify your mailing list subscribers about your regular blog posts. This is a proven way to build repeat traffic to your blog. Each time you post, your list gets a notice with a link to your new post. Here’s how it’s done with Aweber:

Log into your Aweber control panel, choose the appropriate list and click the Messages tab – then click Blog Broadcast.

In the rss feed box, put the url to your blog feed – in WordPress, it’s normally http://www.yourdomain.com/feed.

Select Auto Send, # of Items = 1, basic template.

For your subject line, use something like this (all on one line): 

{!firstname_fix},

A New Blog Post:

{!rss_itemblock}{!rss_item_title}{!rss_itemblockend}

In your message box, use something like:

Hey, {!firstname_fix},

I have just posted a blog entry:
{!rss_itemblock}

{!rss_item_title}
Read more: {!rss_item_link}

{!rss_itemblockend}

To Your Success,

Carl Ringwall
Data SystemsPlus

{!contact_address}

That should do it. Post regularly, and try to keep your content relevant to your list.  If you have not tried the Aweber autoresponder service, it is highly recommended.