If you do Adsense, you're going to have to put up more than one website - perhaps dozens if not more to make decent money. 

If that appeals to you then Adsense is good because it's literally on autopilot outside of keeping content on the blog and keeping the sites up in the search engines so … Read more

Who are your ideal customers?

Once you answer that question, you'll need to find the ways to tap into that market.

Online, there's social media, paid marketing like pay per click, Facebook Ads, etc...

You'll want to keep in mind your budget when you decide your marketing plan of action.

Once someone has bought from you once, they are more likely to buy from you again.

In other words, it's easier to sell to an existing customer than someone who has never done business from you.