I submitted this after seeing it tweeted by rand, so I'm surprised I own it. I have read it before though and have kept it as a reference for my tweeting. I was surprised how paper.li was a +ve effect. I personally don't check other peoples papers much but have my own semi-private ones to sift through and find the top articles for me. A bit like this I guess.

One of the best tidbits in this article is the link to Rand's process for testing tweet hypotheses: http://www.seomoz.org/blog/calculating-and-improving-your-twitter-clickthroughrate I love Dan's analyses and data, but results can vary wildly between different audiences. Rand's process for testing theories about your tweets (Does a word choice like "Realtor" vs "real estate agent" matter? Does referencing the New York Times or the Wall Street Journal get better click-through?) lets you figure out what works in your industry.