HubSpot, a marketing software company founded at MIT in 2006, has revealed a brand-new analytics tool that could help companies more effectively use Twitter for branding or promotional purposes.
...Retweet Lab's data is simple to use and surprisingly powerful. For example, in my case it revealed that I get the most retweets at around 7 p.m., even tough I usually tweet the most at 9 a.m. Thanks to the Retweet Lab data, I can now start tweeting more around 7 p.m. and in theory improve my Twitter influence. Similarly, the tool notes that tweets without "calls for action," such as "please tweet this," are infinitely more effective at generating retweets than ones that include such pleas. While this sort of information is useful for my own personal "brand," it's much more likely to be useful for bigger publishers or well-known brands....
I can't say enough about the ReTweet Lab tool. You MUST test drive it. Powerful insight.