The best way that I found to make money from WordPress sites is in the targeted membership niche.
You create a great looking website and fill it with targeted information that is relevant to specific niche, for example Dog training.
Then you run the backend membership site using a plug-in, I recommend digital access pass and I use it on all my membership sites.
This allows you to sign people up to mailing list, but also signs up into a free account, where you can target them with free information, drip fed through the plug-in.
You can then offer a mix of upgrading their accounts and buying individual items to add value.
You can then clone this site structure, change the content to any niche and profits if you send really targeted traffic to it.
I have an idea to some sites with wordpress to make money with this niche, I should create more articles/tutorials about wordpress and doing SEO for it to get a litte traffic from Google.
Are there any ways you know to make money from wordpress blog sites? please share your advice