As I already mentioned above, it doesn’t matter how small or big your company is; you need to take care of your SEO. Remember that 89 percent of consumers use search engines to help make their purchasing decisions. To get people to buy from your company, you need to make your site visible at some point in the buyer's journey, which means you need to definitely be visible on the search results pages.
So, you have downloaded your links profiles on a CSV and you now have an extensive list of all your linked domains. If you have been doing SEO for 8+ years like me you can probably just know from analysis which links are bad from a TLD and URL point of view. If you do not know too much you can use tools such as Link Detox: http://www.linkdetox.com/ to complete analysis of your link profile. I would always consult the advice of an expert SEO in this instance because it is easy for these tools to mistake good and bad links.
I don't generally think of my own list as a traffic source, because those are people that subscribed and keep coming back, mostly because of good content. This is more tutorial about where to get fresh traffic from in case a person is not using some of these sources already. Where have you guest posted, I haven't seen any, would like to read some of those :)