There are many sites online that are dedicated to ranking products such as music, movies, videos, and electronics. These are great indicators as to which products are hot right now and will often lead into many great opportunities online.
A great example of this is if you go to Billboard.com. This website is basically the be-all/end-all for music rankings, and it is declared as "status" if an artist can reach the one position. If you are interested in promoting music, finding niches within the music industry, or targeting some of the more rare artists for your online promotions, then this is a great place to go.
The same goes for the online movie rental store, Zip.ca. If you register for their newsletter you get sent information about the newest released movies and their top rentals, etc. These will be the highest volume searches in terms of movies online and the highest converting terms. Better yet, Zip.ca has an affiliate program and there are an abundance of other affiliate programs within this industry. This leads into great opportunity as an affiliate.
Here are a few examples of "Top 100" style websites:
(Top 100 Songs)
(Top 100 Websites in Different Categories)
(Top 100 Movies)
(Top Selling Books)
(Range of 20+ Bestselling Categories)
Note : Top ranked products are typically highly searched, and people are much more likely to make an impulse buy of something that is "hot". Remember this if you want to leverage current hype to increase your online earnings.
World Events :
There are world events that take place each and every year that open the doors to a lot of cash for Internet marketers. Some of the most recent World Events were the Super Bowl, Australian Open, Valentine's Day, Easter Holidays, Chinese New Year, Christmas, Olympics, and the World Cup. These are just a few of the events that have taken place over the last year. If you do a little research you will unravel many more "world event type" marketing opportunities.