Guy Kawasaki usually use that trick. And it works!

You would think that the skies would open up, and I’d get struck by lightning by the Twitter gods. Think again. In the case of repeating a tweet four times in thirty-two hours, there was a big spike for the first tweet, but the next three still yielded very good results. In total, the four posts resulted in 5,059 clickthroughs in tranches of 1,481, 1,415, 1,208, and 955; note, however, that approximately 20% of these clickthroughs are bots. 700 people signed up for this service, by the way.

Continue: How to Drive Traffic with Repeat Tweets