This particular type of marketing calls for preparation in the way of having a plan that you can work from. A good, well planned viral marketing campaign gets noticed, and usually leads to a much targeted execution. What you should do is really just focus on the process of working to make a campaign viral. The important take away from this is to know what you intend to do, as opposed to just making something and then hoping it will go viral.
One nice thing about the news is that you can do a lot with it, and all niches have news in them. You can make your own news or take something and do something cool with it. People are always talking about the news, and that makes it perfect for this. If you see something that is different, then start thinking about what you can do with that. Remember that people may be familiar with it, but you can give it some kind of spin.
Think about the written approach in which you write a short ebook and serve it up to your visitors. What ever you are offering, be sure you give a call to action to send to their friends. There are lots of things you can do with this, and you are not restricted to a simple PDF. But if you get it right, you can expect your stuff to go viral.
What you want to do is trigger the type of advertising that comes when people share information. Most of the time something like a product will not become viral unless it has a recognized name attached to it. There is a novelty aspect to viral events, and it cannot be something people have already seen before. Now you know a lot more about this than before, and you can use these tips plus others out there.
The feedback about this is typically along the lines of surprise reactions when people read about Internet marketing, here. Perhaps you do not need comprehensive knowledge, but having that will always help and never hurt.
As we always say, it is usually the little things that can turn out to be the most important. Going beyond what has been talked about here, you may want to pick something that appeals to you or is relevant. The hierarchies that are inherent in this will prove to be most enlightening.
Whether you choose to commit to more timely research is of course you decision, and we find many people do exactly that.
Bonus Video: Viral Marketing: Expert tips, ads and examples