You can join Earn Easy commissions for free and still earn an income.  The free membership provides you with a unique affiliate link that you can share.  Free members will have access to promotional tools; Banners and Solo Ad email swipes and Facebook images.  I personally do not use solo ads as a marketing strategy due to the cost and risk associated with them.  
You can create your blog using a free platform from WordPress.org, but you’ll need to pay a small amount – as little as $4 per month – to have your blog hosted. Try GoDaddy.com, which can provide a domain name for your site, email addresses, database storage and other Web hosting services. To make money, you can use the free Google AdSense service to display advertisements on your site. The amount you’re paid varies by ad and usually depends on how many people see it. There's also what's called affiliate marketing, in which you earn a commission (usually less than 10%) whenever someone clicks on an ad on your site and purchases a product. The Amazon Associates affiliate program allows you to advertise the retailer’s products on your site, or try affiliate networks such as CJ Affiliate or ShareASale that work with thousands of companies. Depending on how much time you put into your blog and how many people visit it, you could be making a few hundred dollars each month within a year.
This was a wealth of helpful information, thanks. In the first section you described how you found your niche. Any more suggestions on how I would find a niche that would be profitable? I understand you probably want to find something that you can write good content on, but what steps would you take to make sure to validate that it will be a good niche to work on? Thanks for any help Tom.
As an affiliate for Boatbookings, you will receive 20% of their revenue - effectively meaning your commission will be about 4% of any sales from your referrals.  You also receive 10% of any commissions Boatbookings make on repeat customers who were your referrals. They do have a minimum charter value of 3,000 ($/€/£/etc) before commissions are earned.
If your domain is your address, hosting is like the actual house within which your site will live. It's your own little slice of the internet — the place where all your website files live. Hosting is very affordable these days, so don't unnecessarily scrimp on costs. Go with a reputable, reliable provider because your affiliate marketing business depends on it. 
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