What are the best tools to effectively use social media as a lead generator?

I believe social media has huge potential in terms of lead generation, especially when we combine it with social media monitoring. Of course, there will be businesses that will struggle with finding new customers online, but the majority of those companies might want to have a look at how effective social media monitoring can be. Just look up the keywords that are the most relevant to your business and industry and see what conversations could you possibly engage and provide value to. On another note, check phrases such as 'can anyone recommend' or 'where can I buy'. Those are shared tens of thousands of time on a monthly basis and very often remain unengaged whereas these are potential sales opportunities.