This is a great (and beautifully styled) info graphic from Quicksprout. 

In a nutshell, to get maximum re-tweets you need to:

1. Make your tweets 100 characters
2. Say Please Retweet
3. Tweet on Friday lunchtime between noon and 2pm
4. Include a URL and a hastag.

And if you can do all of that in 100 characters or less, and make it a compelling and interesting read then you're a genius or a magician!  Good luck.

Here's the final cheat sheet from the excellent Linchpin SEO.  Having worked closely with our clients on an integrated social media commercialisation strategy we are more than conscious that the little details make the biggest difference.  So, use the cheat sheet below to get ahead and ensure the maximum ROI for your Facebook channel.  Note, if you're not currently measuring your own stats based on the criteria below, then now is a good time to start!

The infographic below from Linchpin is fairly self explanatory.  If you want interactions for your tweets, then tweet on a weekend!