AutomotiveSEO
Tip #3 - putting Tweetmeme on my blog, more than doubled my retweets. It also helped to "revive" old posts when people got there months later through SU or search. Had a story over 3 months old get picked up by a strong twitter account and picked up over 500 new retweets as a result.


Story: 13 Tips for Getting More ReTweets