I am using twitterfeed.com to auto-generate tweets announcing each new post. This twitterfeed engine is running 24/7, making a constant stream of tweets.
The two graphs below represent hits to the blog, melikestheocean.blogspot.com. The graphs represent hits over the past week and past month, respectively. Note that there is a long flat baseline to the curve: this is a measure of success for the twitter stream.
I also, Friday morning during breakfast and before retiring, used stumbleupon.com to add about four posts each time. Stumbleupon allows you to "Add a Page" to their stream of pages that users who are interested in a particular topic will see. It is a sort of "captive audience".
The two spikes in the week's curve represent my two sessions of adding pages to stumbleupon. The month's chart show the success if thus approach compared to that of the steady twitterfeed. There's been a completely steady stream of posts every day, just a big difference in the effectiveness.