Search volume based on trends is ever-changing. Twitter, YouTube and news aggregators are great resources for identifying popular trends. Take advantage of trends in your field as well as trends in business, technology, local, pop culture and world events to promote your product. You can garner significant web traffic by beating your competitors to the punch.
Of all the tools listed in this article, Moz Link explorer is an old one & quite popular. If you want to compare backlinks between two or more domains, Open Site Explorer is worth trying. This tool works best when you have a paid account of SEOMOZ though a free version of this tool is good enough to get you started checking the backlinks of your site and the sites of your competitors.