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Although peak Twitter hours coincide with the workday, retweets are actually higher during our off hours. On average, we retweet more on Sundays than we do on any other day of the week, and Twitter sees more retweet activity from 10-11 p.m. than it does for the rest of the day. Hashtags and at-replies help: The use of hashtags and at-replies was also found to have a positive effect on the amount of times a tweet would be retweeted.

tweets with images are almost 25% more likely to get retweeted--an increase from .404 retweets/1K followers to .496 retweets.

tweeting in all caps will net you .8 retweets on average per 1,000 followers, as opposed to tweets with only one-tenth of their text in caps, which averages out to .147 retweets per 1,000 followers.