Hi, Having read all this advice I can see its going to be a busy weekend! After 'Panda' many sites have collapsed but I have found that Squidoo has surprised me as it seems to be keeping popularity and as mentioned above, makes a little money as well as helps driving traffic. Hmmm...50 ideas....shall I start from the top or be different and work my way up from the end of the list?
Secure (https) to non-secure sites (http): Since Google began emphasizing the importance of having a secure site, more websites are securely hosted, as indicated by the “https” in their URLs. Per the security protocol, however, any traffic going from a secure site to a non-secure site will not pass referral information. For this issue, you can correct by updating your site to be secure through a third-party SSL certificate.
Blog comments have a number of sources of value, and traffic is just one of them. By monitoring your competitors and your betters, you get a keen sense of what the industry is doing and where trends are going. You leave valuable comments and people take notice, including industry influencers and possibly the owners of these top-tier sites. You create a gateway back to your site, and even though the links are nofollowed, they’re still links for people to click. You also build a personal reputation as a commenter around your industry, raising sentiment and value.

Good question, for most directories I use they ask for mobile number to send a message of verification, for the ones which phone you for verification inform the company before hand to tell their customer service people to be ready. I know the bigger the company the more tricky these things get you just have to find out what works best to answer the calls even if they give you a direct number to use. 
Beyond organic and direct traffic, you must understand the difference between all of your traffic sources and how traffic is classified. Most web analytics platforms, like Google Analytics, utilize an algorithm and flow chart based on the referring website or parameters set within the URL that determine the source of traffic. Here is a breakdown of all sources:
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