Amazing list of free solo ad websites. I have never believed in solo-ads. But I will definitely try them and see. As you said copy-writing , landing page, split-testing skills will help us a lot in getting good conversions . Really great tip on creating new email accounts to get free credits. Tracking your clicks and visitors will let you know that if we are getting good conversions.
To make sure you're only sending emails to the people who want to read them, clean up your email list so that it excludes recipients who haven't opened a certain amount of emails in the campaign's recent history. This makes sure your emails' open and clickthrough rates reflect only your most interested readers, allowing you to collect more effective data on what is and isn't working in each email you send.

One of the great things email has going for it is that it can adapt on a dime and turn on a penny, meaning that it has the potential always to be relevant and timely. This is very different from social media posts, which are less intensively targeted, less time-focused, and work on more of a broadcast basis. The capacity to intensively segment, target, and stream your email marketing also helps you to narrow your analysis to certain points. By doing this, you can learn a lot about your brand, your customers, and your marketing profile in general.

Genuinely effective campaigns segment the market as carefully as possible, and target accordingly. Relevancy is key for getting people to open emails and respond to your CTA – but what's ‘relevant' differs from person to person. If you're going to make your emails as relevant as possible to everyone who reads them, you need to Segment, Target, and Position.

Sometimes low-hanging fruit is as easy as it looks. Personalizing emails, as well as segmenting them—a marketing technique that teases out your subscriber list to send relevant emails to specific subscribers—can offer significant returns. Segmenting emails allows you to target specific groups of subscribers, which leads to substantial increases in click-through rate.

Personas provide a multi-dimensional method of targeting. They’re based, as the name suggests, on a projected persona for each customer ‘type’. Get it right, and personas can help you enormously in both predicting behaviour and personalising your communications. Personas are a powerful technique, and they’re increasingly used to improve the usability and customer centricity of communications.