Find a profitable niche. Starting with your interests, write down as many niche ideas as you can. Think about topics people might search online. Ideas include passions (like surfing or body building), fears (like spiders or speaking in front of crowds) and problems (like getting out of debt). Do keyword research to see it others are interested in the topic. Find out if a domain name is available that matches the keyword 100 percent. 
These ways of making extra money cover a wide range in terms of compensation and prestige. Check out the options to see what could work for you, keeping tabs on a projected per-hour rate so you can see what would be worth your time. The list is loosely arranged by 1. jobs requiring more skill or expertise, 2. gigs needing less and 3. things you can sell. And if you think of any good options I missed, please let me know in the comments.
22. Advertising – This is definitely the most old-school way of earning money with a blog. It’s also starting to become the least common way. You can sell advertising spots directly on your site or you can sign up with a company like Google AdSense or Media.net. Either way, you won’t see a whole lot of money from ads until your views are well into the thousands each day.
I have a free WordPress website with 1000-2000 visitors/month. I was trying to place Amazon Affiliate ad links last night and failed/flailed mightily. I would paste the links into my posts in the HTML mode, switch to Visual mode, and could see the image. However, every time I tried to save or update the post, the image reverted to the gangly hyperlink. As some suggested, I tried cleaning the links of any formatting from the copy and paste with text edit. No dice.
Español: ganar dinero, Deutsch: Geld verdienen, Português: Ganhar Dinheiro, Italiano: Fare Soldi, Nederlands: Geld verdienen, Français: gagner de l'argent facilement et rapidement, Русский: много зарабатывать, 中文: 赚钱, Čeština: Jak vydělat peníze, Bahasa Indonesia: Menghasilkan Uang, العربية: ربح المال, Tiếng Việt: Kiếm tiền, 日本語: お金を稼ぐ, 한국어: 돈 버는 방법, Türkçe: Nasıl Para Kazanılır, हिन्दी: पैसे बनाएँ (Kaise Paise Kamaye, Make Money)
But cutting costs only goes so far. Unless you already make a lot of money and spend like a bon vivant, most people can’t eke out that much more from their budget by decreasing expenses. Plus, the more you retrench, the more your quality of life suffers. (It’s all relative, though — certainly some overspenders could actually improve their lives by tempering their expenditures. Here are 101 ideas for saving money.)
I recognize that the list above is short; however, that’s because Amazon affiliate marketing really doesn’t require a specialized theme in order for it to work well (unless it’s one of the unique cases noted in the themes above). Instead, you’re better off using WooCommerce if you want to build a full affiliate store or simply stick to the WordPress theme you currently have and add affiliate plugins to the mix.