There's no one fixed magic formula or silver bullet for what is going to go viral on Twitter but here's a few things I've learned along the way both in managing our teams tweeting and working with our clients, and also from the collective intelligence of the many experts we follow.

But first, why is this important? Or better yet, is Twitter still relevant or is it "dying" already?

Twitter members are learning how to use it and finding both their voice, and their pace, as well as ways to manage overload. You can see for yourself that engagement is up when you find more members with completed bios, location and links to their LinkedIn profile, Facebook account, blog or company page.

So...yes, Twitter is still important and relevant. From HubSpot's third State of The Twittersphere Report we learned that:

• Twitter user growth slowed from its peak of 13% in March 2009 to 3.5% in October.
• Twitter is experiencing a decline in traffic to Twitter.com, as reported by ComScore, Quantcast.com and Compete.com.
• BUT... though growth may be slowing, the average user appears to be more engaged than before. Today the average Twitter account has 300 followers; in July, it had 70.
• The average account now follows 173 accounts; in July it was only following 47
• The average account today has posted 420 updates; in July that number was 119

OK so you are sold on the concept and you know that you want to use Twitter. Now what? Well, like I said above, there's no formula but here's some tips that may help - and be on the lookout for as we find more we will publish them. (Also check out our Twitter GuruGuide for Recruiters)

What time should you tweet? 

• Tweets sent in afternoon and early evening get more clicks
• Among weekdays, Thursdays enjoy the highest click through rates 
• Monday and Friday afternoon tweets tend to be re-tweeted most often than tweets at other days/times

How else do you get more re-tweets ?

• Tweets with links get re-tweeted more often, which this is great, but...
• The more links to jobs you post, the less likely people are to click on them overall so moderating is key
• Use higher language - tweets that are complex, brainy, or using "bigger" words get re-tweeted more than simpler ones
• Inclusive language such as “we” and “you” gets more re-tweets
• Self-mentions get re-tweeted the least
• Describing relationships and affiliations will also increase your re-tweets. 
• News and instructional tweets are more often re-tweeted than product, opinion or small-talk posts

So while we can't tell you what is going to go viral, your chances increase if you start your tweet campaigns on Monday or Friday afternoon, tweet in the afternoon or early evening most of the time, send our your links on Thursdays, be more selective on what links you share and make them about news or something educational

Hat tip to HubSpot's Dan Zarrella and his PubCon presentation